#underfell headcanon

[erineas]

Nobody asked for it but now I throw you:

ROCK HEADCANON ✨

They let it hang out with other pet rocks, sometimes they even feed together but Doomfanger is always there to suffocate them:

She likes they're always warm and you'll never know they're under there until she moves hours after.

Edge loves his little psychopath as much as we love them @unnamedcrane

[the-fabled-void]

Underfell hc: "climate" conditions we see in Undertale are more extreme in Underfell. So the cold in Snowdin is a harsh, biting cold instead of a comfy Christmas cold, the air in Waterfall is uncomfortably humid and the ground makes a wet noise no matter where you step, and Hotland almost burns you alive if you don't know how to deal with it

That's all thank you

[cloudyskydreams]

Howdy!

I was wondering how the papyri boys (or whoever you’d like to write for!) would react to an SO who has major cuteness aggression and has no choice but to nuzzle them aggressively or bite them.

Thank you for your wonderful writing and I hope you have a lovely day/night!

I get cuteness aggression so bad sometimes

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Undertale:

Papyrus:

He's a little shocked the first time you do it and just watches in mild concern as you nibble on him.When you explain it he is so pleased he's cute enough to trigger it in you. Will accept your nuzzles and bites like it's any other form of affection and might nuzzle back into you with a skeleton kiss.

Sans:

Oh wow he's a little surprised at first y'know he's just not used to being a chew toy. Definetly makes as many biting jokes as he can anything related to teeth(I'm not creative enough to come up with some bite me (hehe)). He'll nuzzle you back gently and just accept his fate when you attack him with love.

Underfell:

Edge:

He's a bit put off at first and thinks you're having an episode the very first time. Doesn't understand what's going on when you're knawing on his bones in affection. Concerned look and slight disgust over the saliva on him the first few times but he gets used to it and just accepts it with mild exasperation. The nuzzles he can deal with better and will nuzzle you back in skeleton kisses though not as aggressively.

Red:

Absolutely thinks you're fucking weird but you're his weirdo so he's okay with it. Does not get you at all when you're straight up chewing on him but he understands this is one of your ways of showing love so he's just taking it with a grin and a head pat. Gets the nuzzles and will aggressively nuzzle you back with skeleton kisses while he holds you down so you're forced to accept them.

Underswap:

Stretch:

Thinks its nice and loves this form of affection as much as any other kind. Will aggressively skeleton kiss you back. 100% willing to return the energy. Doesn't really think of himself as cute so when he does something that's clearly adorable he's always a little surprised when you basically affectionately attack him.

Blue:

Also has cuteness aggression so he understands you. Nuzzles and bites you back just as aggressively and with just as much love. Sometimes he'll "fight" back and gently push you away or pin you down so you can't do anything and then he'll cause a counter attack.

Horrortale

Willow:

His brother has the worst case of cuteness aggression out of all the boys I write for so he's used to this. Will return the nuzzles and let you bite away at his bones as he gently pets your head. He doesn't understand what you two find so cute about him but it's kind of nice to think he's cute enough to cause an aggressive response.

Axe:

Oh yeah he loves this. Just stares at you with his big ass eyelight as he purrs loudly while you nibble on him. Nuzzles into you affectionately and so hard he knocks you over sometimes, he doesn't stop when he does either just climbs on top of you and continues the love attack.

[stellocchia]

I saw a fair few fics where Papyrus introduced Mettaton to Sans and Sans did the whole "Overprotective father who considers his daughter property and therefore doesn't allow her any agency" act, when there's a much funnier alternative to have Sans be a protective jackass without any of the implications about Papyrus being unable to make his own choices...

Like, Sans canonically works for Mettaton guys. He does stand up comedy at his resort. And we know Mettaton isn't a great boss and the working conditions under him are not fantastic, have you guys seen Burgerpants?

He absolutely would give Mettaton shit if Papyrus brought him home! Like, can't believe that, of all people his cool little brother could have dated it was the capitalist. Smh.

Buddy would also definitely leverage that against his boss. I'm imagining things like: "If you don't give me a raise I'm gonna show up to the wedding dressed in my pajamas" "Papyrus would hate that too" "Papyrus is happy any time I get out of bed in the morning, try again buckaroo"

[haveyouseenthisskeleton]

Exhausted, Papyrus fell on his knees in the dust. It was covering everything in the room, from the floor to the ceiling. The main door was gone, like most of the windows. Thankfully, no monster tried to enter the balcony, too high. Papyrus crawled to pick up the door, still in one piece by some miracle, and put it in its place. The hinges were gone with a part of the wall, but he forced it to hold by nailing it with some planks that held the windows closed and was now on the floor.

He picked up his phone, hidden deep in his armor. His hands were still shaking with the adrenaline. Sans left about twenty messages, asking if he was fine, then warning him Frisk was gone, then asking him again if he was alright, more and more distressed as the hours went by.

Papyrus simply sent: "Alive. Frisk here." before walking to the kitchen to make sure the child was fine. Several bullets ricocheted against the closet door, but it faced the brunt efficiently. He cleared the chairs out of the way and opened the door, maybe too brutally.

Frisk screamed out of terror and threw themselves in the back of the cabinet. They curled up on themselves, hands on the head, sobbing uncontrollably. They were shaking as well.

Papyrus flinched. He saw himself at five years old, in the same position, as Sans was screaming and fighting for their lives in the living room. This was not a world to grow up. No child should ever be born in this hellish place. Bitter, he felt his soul squeezed painfully. It was his fault. He should have brought the child back to the Ruins. Frisk shouldn't have assisted to any of this.

The skeleton kneeled at their level. He never had been really talented to comfort people.

"Frisk? It's over, they're gone. You can come out."

He leaned a hand towards the human. Frisk kicked it away and tried to get as far as they could from him in the closet. Papyrus tried to stay neutral, but his face betrayed for a few seconds how much it hurt him. He didn't want Frisk to be scared of him. Not after everything they went through to protect them.

The skeleton looked around for a second and noticed a hole in the closet door. Small, but enough for a child to witness everything that happened outside. Frisk saw him slaughter attackers and end monsters on the floor without mercy. Papyrus felt guilty. He gave the child some space and sat in front of the closet, unsure what to do.

No Weakness, Chapter 3.

_______________________________________

Hello, hello!

I commissioned this masterpiece to @seirindono, a French (yeah, team French!) illustrator who works on a multi AU universe called The Missing Scarf, which is a banger. Really cool comic with lots of great characters that you really want to read. Go read it!

I wasn't sure on which fic I wanted a drawing at first, but since we already got one for Horrortale: Rotten Apple (thanks again Zeragii, love you), why not No Weakness?

It's a post-pacific Underfell fic where instead of breaking the Barrier, Sans refused Frisk to fight Asgore and brought them back in safety to Toriel. Now Papyrus, Undyne, Alphys, Mettaton, Toriel and Sans are hiding the child away, trying not to get killed.

The story however is about Undyne and Papyrus' friendship. After Papyrus surprises Undyne kissing Asgore, he is promoted to general of the Royal Guard. Except Papyrus knows something is really wrong here, since that role was obviously supposed to Undyne's. But the more he tries to understand, the more people try to dissuade him from learning more. All the hints lead to Asgore, but how to reach the monarch without getting himself killed, and by extension, those he cares the most about? Between his duty and his friendship, Papyrus will have to make a choice.

I asked for one of my favorite parts ever, which is the moment Frisk realizes how things really work in Underfell, after witnessing Papyrus committing carnage right after he got promoted to General. It's tradition :D

Anyway, if you want to read the story, it's right here. I'm on summer break right now, but new chapters are coming soon!

Thanks again to Seirindono for their amazing work, I love it so much <3 Really great artist, don't hesitate to commission them! They're really nice and pays great attention to details. It was really cool collaborating with you <3

Go send them some love!

[skeletonh0e]

Headcanons about us overstimulating the boys until they go dumb pls? 🥺👉👈

Oh ho! I like how you think, read more for NSFW, the reader is gender neutral and I kept their anatomy vague. There's talk of a "hole" but no explicit reference to any type of genitals.

Also so I don't have to repeat this for each boy, there is a safe word in place so they can always legit tap out if they need to. Remember to practice kinks like these safely

Overstimulation | 🔞 Minors DNI

Classic Sans :

Let it be known Sans is not someone that loses his composure very easily, he remains calm, collected and confident even under some extreme pressure

So it makes you rather proud when you have him whimpering, panting and moaning beneath you like a bitch in heat.

You loosely tied his wrists to the headboard of the bed, placing yourself happily in-between his legs to play with his cock at your pleasure. Sucking, stroking, licking, milking orgasm after orgasm out of him, strains of his cum littered on your face and chest

A borderline devilish smirk on your face as you do so, one that really completes the look you have going on right now

There is a part of him that's trying to act like you aren't getting to him as much as you actually are, but it's not really an act he can put up for long.

Especially as you make him cum again and he nearly cries from the oncoming wave of pleasure, hips bucking wildly as you pull your hot mouth away from his aching member

"holy fuckin' hell you're gonna be the death of me at this rate-"

You giggle as you watch the fresh load of cum spill out of him, idly collecting it with your hand as you go down to massage his seed around your hole, you don't need much preparation to be honest but it's a little show to put on for him

You can see his dick twitch pathetically despite another whimpering erupting from him

"You you wanna fuck me?"

"y-yeah..."

He's so cute like this you almost consider making him cum again and really beg before you let him inside you, but you have some mercy on him and position yourself properly. Feeling accomplished at the relieved groan he gives once he's finally penetrated you

You ride him for the next several rounds, while it gives you some much needed relief you're still hellbent on uttering pampering your boyfriend, making sure he finishes plenty. He's basically an exhausted bag of bones who might as well be brain dead by the end of it

You're there for after care, soothing him, cleaning him, cuddling him, always double checking to make sure you didn't actually go too far.

Which he always just chuckles at before teasing you, "really know how to make a skeletons day night huh?"

Underswap Sans :

He's been such a good boy lately and you can't help but want to utterly spoil him, he's normally so hellbent on pleasuring you after all. So why not make tonight all about him?

And with your special touch? The poor boy is utterly pubby in your hands.

You hold him tightly in your arms as he trembles and whimpers, roughly plunging the vibrating fleshlight up and down on his cock. Enjoying all the cries that escape from him as he cums again and again and again, the poor boy cannot fucking cope. Especially when you keep the toy tightly down then rock it back and forth on his pelvis

He moans your name like a fucking mantra, face completely flushed as he nuzzles deep into your chest basically seeing stars at this rate

He starts to beg and moan that it's too much, that he physically can't cum anymore, that he can't take it before you soothe him, tell him that he's doing great, how pretty and cute he looks all the while, that you love him, that he's such a good boy and you nicely ask if he can just cum one more time

And before you know he's already finished again, whimpering all the while

Eventually the toy is removed the thing oozing with his seed, you make eye contact with Sans as you take a deliberately slow lick from it

Just like that his previously completely used up dick is hard again.

"You want more?"

"f-fuck me properly...please....please....please-"

How can you deny such a sweet request?

He goes for several more rounds before he actually is finished though, once again surprising you with his stamina especially during aftercare where he seems mostly recovered.

He is now dead set on "repaying" you for this and you can't help but just give him a little kiss on the forehead

Underfell Sans :

This man? This man right here?

Does not bottom often and it's very rare he lets you have any form of control when you are on top, so when he does let you switch it up? You go all out, he's tied up good and you tease the hell out of him. Taking your time with his body, massaging every spot that earns a moan, biting certain tender areas and your movements being slow delicious torture on his cock

And he's an utter brat about it the entire time

Constantly squirming, cursing like a sailor and demanding that you fucking get on with it already only for you to giggle then proceed to just take your sweet time

You take pride and joy over slowly breaking that haughty attitude of his, first time he cums he just scoffs, the tenth time he cums he starts to get....desperate...

Definitely makes you work for it, but you know how to press every button by now. What really gets him going is when you slowly run his member across your soaking wet hole then move away once he attempts to jerk his hips toward it

Especially as you cum alongside him, pleasuring yourself while the other hand works his dick. Getting him so close to where he wants to be but not letting him.

"y-you evil f-fucking bitch! i-i swear when I get my fucking hands on you when i get my hands on you when i-"

"Boys that use that language don't get to be inside me, try again."

He cums three more times, before nearly sobbing then properly begging to have him fuck you and be your little boy toy for tonight

And you enjoy every second of the sight.

Rest assured, though, he WILL have his revenge. Maybe not tonight but soon.

Horrortale Sans :

You gotta be bold as fuck to want to overstimulate this man, let alone overstimulate him to the point his mind goes blank from pleasure

He's a bit of a wild card even outside of the bedroom when he's perfectly calm, having him experience multiple orgasms? You're gonna drive him beyond feral

He needs to not only be restrained but muzzled because he will start biting and biting hard once you two get deep into it

You ride him, roughly without any regard for pace, taking full advantage of the fact that his restraints don't allow him to properly match any of his thrusts, always pulling yourself off of him the moment he cums and all you hear are the lowest growls out of him

It's quite literally like watching a caged animal slowly go insane, he growls, he grunts, he desperately attempts to get out of his restraints and at one point you're worried he'll almost break them outright then he'll be set upon you

Which turns you on more than it should honestly, but until that actually happens you keep your focus on giving your unhinged lover more and more pleasure until he simply can't take it anymore.

He's not much for conversation during this, then again he wasn't exactly the biggest on pillow talk period but you make sure to praise and tease him all the while. It's not entirely clear if he hears everything you say between orgasms but there are certainly times where his body clearly reacts

And it reacts violently

You do finally let him finish inside, earning what can best be described as a primal yell from him that outright echoes off the walls

He passes out once he's reached his limit, you unrestrain him then work on caring for him, but about half way through cleaning him up his socket suddenly lights up and you're pinned down before you know it

You're in trouble <3

Underlust Sans :

You two always like to test limits, experiment, and generally see the best way to fuck each others brains out, this is definitely not the first time you've pulled this kind of stunt on him

And if there was ever one word to describe him, it was resilient

He has a lot of experience with this kind of thing and a lot of natural control over his body especially when it comes to sex so it's a definitely a case of go big or go home

He's not only tightly bound, but blindfolded with a vibrating cock ring on the highest setting with another toy being thrusting roughly in and out of his rectum, you deliberately controlling every movement of course

And he loves you taunt you about it, "this the best you can do baby? might just fall asleep over herrrrreeeee-!"

A particularly harsh thrust of the toy gets him to cum mid sentence tongue sticking out as she starts to drool rapidly

Rest assured you return his energy, asking if he's really got it altogether, teasing him by pointing out how violently his cock is throbbing is twitching and smugly asking if you're officially too much for him

It's fun banter, but it gets harder and harder for him to keep up especially as you get more aggressive in your approach in utterly dominating him.

And he won't lie it's hot as shit especially you seeming so eager to abuse him until he's basically your little fuck toy built for your entertainment, drooling like an animal and the perfect picture image of a needy little slut

Your little needy slut

By the time he uses the safe word and taps you, he immediately starts brain storming ideas for the next session you have together. Most definitely planning to return each moment you made him cum without mercy personally

[dragonridernoobie]

Glad to see a undertale au author still up and running.

Thoughts on writing a feral underfell bitty sans (possibly abandoned, escaped from a bad place, neglected? Who knows) the reader finds injured and patches them up + befriends them?

Some bitty fics include feral bitties travelling together, like a horror or classic sans with a fell.

Basically, go nuts, no strict requests. Interpret it how ever you like :)

Hope you like this request, idk just enjoying the fandom.

Enjoy the rest of your day/night ^-^

I am so happy to do this! It reminded me of a picture I found on Pinterest that I wanted to adopted fell san bitty. Here is the picture. Also, I'm gonna do it with fell and horror since they where abandon for there looks and attitude.

To anyone else reading this: You will adopt him, and if you don't, I will find out where you live and kill you. Then I'm gonna bring you're ass back from hell and make you write a sorry letter to a fictional character.

Enjoy <3

FellSansBitty X Reader X HorrorSansBitty

It was just a normal day in Ebbot city. All you wanted to do was get a coffee and some treats but mother nature decided that you where gonna deal with nature and threw the biggest Strom the city has seen.

You where currently running down the street, you're jacket over you're head to stop getting wet.

While on you're way back home, you ran by a alley you passed a million times. Though, this time was different. You heard crying. You stopped and tried to listen over the heavey thunder and rain but you couldn't.

When you got closer, you where able to hear it clearer. When a loud thundering boom made it's present, you heard a whimper. When you followed the noise, you came across a wet, broken down box. On the front it said "bitty for sale." There were numbers also scratched out.

25$, 15$, 5$, and free. You looked inside and you saw a bitty. Bittys where interduced to human kind when monsters arrived above ground.

Humans took them quickly and made more of them. They are now used for therapy, friends, pets, and teatchers for the disabled.

Though there were times when bittys did stuff they were not meant to do. Like bitting, talking back, and actually running away from their owners. People called then "broken bittys."

When that stuff happened, people would take them and dust them or put them down in human words. You did not believe in that way since it was wrong, and living things should have free will.

So when you opened the soggy broken box open, you came face to face with the bitty. It looked up at you, scared but also hissed at you in fear.

You used your best smoothing voice to calm into bitty and reach your hand out. Showing it that it can get on your hand if it wants.

When another loud thundering boom was heard, it quickly grabbed you're hand and you slowly raised it up.

Now that it was in your hand, you quickly brought it underneth your jacket and got a closer look at it

It looked like....

FellSanBitty

It looked like a little cherry. It had a big furry black and yellow jacket and shorts.

It had red eyelights.

It looked at you while you stood up and quickly ran to you're house.

Once you reached you're house, you where quick to grab a towel and help the bitty dry off.

It grumble and snapped at you, saying it can do it it's delf

Once it was dru, you interduce youreself. "Hi, my name is (Y/N). What's you're name?"

"....sans...but I like being called red...."

You nod and ask him if he wants food.

You make him some grilled cheese and give it to him.

He complains that the grilled cheese was too cheesy, but he was lying that he hated it since he was eating it faster, then he could chew it.

You had to tell him a few times to slow down.

While he eats, you asked him why he was in that box.

Red stopped eating and looked at the ground.

"No one wants a mean looking bitty..."

Obviously you don't like that so you pet his head and say to him. "I don't think you look mean looking. I think you look tough."

Red looks at you surpised. He looked at you like you were joking, but how you were petting him, you wernt joking.

He blushes and pushes you're hand away.

"I ain't cute."

You chuckle and nod. "Of corse you're not."

"I said I ain't fuckin cute! Now stop fucking petting me!"

You guys are gonna have a instresting relationship.

Pretend that's you're hand.

HorrorSansBitty

When you got a better look at the bitty in you're hand, it looked hurt.

It had a hole in its head, torn up clothes, and seemed to be shaking from the cold.

You held it aginst youreself and ran home.

Once home, you quickly grabbed a towl and help it dry it off, being mindful of its hole in the head.

Once dry, you asked him for a name.

"......sans......but people call me horror."

You nod and ask if he wants some grilled cheese.

His eyes seem to shine at the sound of food and quickly nods.

You make some and give it to him.

You watch him devour the grilled cheese in seconds.

You had to tell him to slow down.

Once he was done eating, you asked the hardest question.

"Why where you in that box?"

Horror stopped eating the crumbs and looked down

"No one wants a broken looking bitty."

You're hurt by his words but after a bit, you take 2 fingers and pet his good side of his skull.

He immediately looked at you surpised but smile and purred.

You just got a skeloton cat bitty.

[popatochisssp]

hiya poppy! i dunno if this is a silly ask but I’m a bit curious… do any of your unique boys have weird condiment obsessions or comfort foods?? tale sans has ketchup, swap paps has honey and so on, i assume that the rest of hoodie gang (what i loosely refer to the lazy brother role as) has the same weird habits. mostly curious about ash, brick, ell, nemo, sunny!

(Anon, I know you did not initially send this on anon, and you included an Art with it that I enjoyed very much, which is why I was so very upset to somehow lose this ask??? Luckily, tumblr cannot eat my emails so I still had the text saved and can at least answer the question, but if you wanted to re-add your art to this post, I would like that very much 😭)

I did do a favorite condiments/toppings post ages ago, when I only had ten of these losers, so it might be about time to update it!

Sans (Undertale): Yeah, it’s ketchup, he likes it on anything and everything, and he will drink it straight ‘cause he’s a terrible gremlin man. He started doing it as a joke to freak people out but it grew on him and, uh… well, now, he just likes it. This is his life and he has no shame.

Papyrus (Undertale): Nothing so uncouth as his brother, ugh! …But… on occasion…very rare occasion, mind you! He…has been known to sneak a spoonful of peanut butter straight out of the jar… Just the one, though, he never double-dips! He’s not disgusting!

Sky (Underswap Sans): As far as condiments go, he likes relish! He won’t eat it straight, if anyone’s looking, but who doesn’t like a hearty helping of it plopped onto a hot dog? Or a hot cat, he’s not picky! Spicy or sour is equally fine, just not the biggest fan of sweet.

Paps (Underswap Papyrus): Nothing new here, he likes honey a whole heck of a lot, though mostly just to sweeten his tea… or in a candy-bar, or drizzled on a pastry or something… Damn, he’s making himself hungry just thinking about it…

Jasper (Underfell Sans): Mustard, obviously, anything else on a ‘dog is the blatantly incorrect choice. Also pretty good on a sandwich, but you’re never gonna catch him guzzling it straight from the bottle. He never tried to pull that prank like his classic counterpart did, and never got accidentally hooked on his own condiment of choice. Ha!

Pyre (Underfell Papyrus): He’ll deny it to his dusting breath, but you cannot bring Nutella or any kind of chocolate spread into the house and expect it to still be there when you come back. He will eat it directly out of the jar, the whole thing, especially if he’s had a hard day or something. You’ll just never find the evidence. He’ll do it with ice cream, too, so y’know…keep an eye on your groceries.

Mal (Swapfell Sans): He likes spicy flavors so any kind of salsa or hot sauce is a favorite for him. His tolerance is damn good, so he can–and will–pull a Power Move and drink it straight if he feels the situation calls for it, but he generally just likes it on his food, like a normal person. Don’t test him, though, remember the freak that lies just beneath the surface…

Rus (Swapfell Papyrus): Can he pick literally everything sweet ever? No? Okay, then it’s probably maple syrup that he likes best, he’ll have it on waffles, in candy, or even to sweeten up some normally more savory foods like beans or ham or just about anything else you can think of. …Not that he, uh…really knows how to cook, himself… But he was a picky eater as a kid and syrup was easy to get in Snowdin, so it was usually used as a bribe to get him to eat A Thing He Didn’t Like and it’s a bit of a comfort-flavor for him now!

Slate (Horrortale Sans): For obvious reasons… he’s not picky. He’ll eat anything– burnt, flavorless, or even a little moldy, just drown it in ketchup and it’s good as gold. Like his classic counterpart, he’ll drink it straight, but surprisingly he’s also developed a bit of a fondness for mayo, mostly post-surfacing. It is not an unusual occurrence to find him just eating it straight, especially if he’s managed to get ahold of one of those squeeze-tubes that make it even easier. You might think he’s trying to pull a vanilla-pudding-in-the-mayo-jar prank but…alas, it’s real.

Papy (Horrortale Papyrus): He’s in the health field and knows in great detail why this is a thing he should probably not be doing but… You know those tubs of whipped topping…? Yeah, he’ll eat that with a spoon until the, “Oh My God, Why Am I Doing This” thoughts hit him and he shamefully puts it back. It would easily be one of the most mortifying moments of his life if you ever caught him at it, standing in front of the fridge in the dark at two in the morning like an oil-and-corn-syrup-loving cryptid.

Ash (Undergloom Sans): Worcestershire sauce is probably his top choice of condiment. His brother’s cooking has spoiled him a little bit, so plain old ketchup doesn’t quite cut it for him anymore. A lot of his favorite foods are hearty, heavy, meaty or all of the above, and Worcestershire can go on and in most of them! Now, will he drink it? No, probably not… but if there’s any on his plate that he can sop up with a bread roll and eat, he absolutely will be doing so.

Yrus (Undergloom Papyrus): No one can know. Whenever he buys those little jars of maraschino cherries, it’s for garnishing drinks or desserts or whatever else he might need them for, and when he cleans out the jars to reuse them for other things, there’s no reason to wonder what he’s done with the juice, probably dumped it, right? Well…no. He drinks it, straight from the jar, like some kind of fucked up, bookish skeleton hummingbird. Don’t judge him!!!

Brick (Horrorfell Sans): Whether he acknowledges it or not, he’s living a bit more of the high life these days than he used to, and with that tends to come some upgrades in the little things around you. In his case, that means he still prefers mustard over any condiment, but it’s Dijon mustard specifically that he tends to reach for—a bit fancier, more of a bite to it, and now the plain yellow stuff feels like a downgrade. He’ll eat whatever, he’s not picky, but y’know…if given the option…

King (Horrorfell Papyrus): He has no such vices…that he’ll admit to. But neither will he back down or show even a hint of shame if you catch him squirting a bottle of chocolate syrup straight into his shaker full of milk that you may have previously assumed was a protein or workout shake of some kind. As for whether or not he’ll drink the syrup straight… You’ll never catch him. Don’t even try.

Merc (Horrorswap Sans): Probably sweet-and-sour sauce for him, there’s a lot of different things to use it on and he likes the versatility of that. To the point that he’d drink it? Yes, sure, boldly so, in front of anyone, admittedly mostly as a bit for the reaction but hey, it’s tangy and delicious, no regrets!

Ell (Horrorswap Papyrus): His favorite topping to snack on is also a backfired prank. His brother is a baker and buys more new and unnecessary kinds of sprinkles than anyone could ever reasonably need, and he may’ve stolen a bottle or two to see how long it’d take him to notice. …And then maybe…grazed on them a little bit one time, when he was hungry and busy and didn’t want to get up. In his defense…they’re crunchy?

Pitch (Horrorswapfell Sans): He’s still all about the hot sauce, baby! Buffalo sauce in particular is probably the favorite, perfect for wings, but he’ll branch out if there are options—especially if they’re advertised as the hottest around, or put to him as a challenge. He’s a defiant thrill-seeker at heart, he all but has to drink it straight from the bottle if someone thinks so highly of it.

Nemo (Horrorswapfell Papyrus): He’s a caramel fiend. He pretty much always has been, in its candy form, but pretty much as soon as he started cooking for himself and realized how easy it was to just put a few things in a pan and have caramel sauce? It was over for him, he does it all the time now. It’s lucky if it actually makes it on top of anything because he’ll eat it by the spoonful almost straight out of the pan, but if he doesn’t, it’s still a perfectly good snack after it’s cooled a little. Not even store-bought jars last any longer in his house.

Sunny (Gastertale Sans): He loves a good steak sauce, obviously for steaks but on pretty much anything—burgers, sandwiches, jazzing up some veggies, what can’t it do? He’s not quite at the level of drinking it straight from the bottle, but it can seem close some days when he’s really slathering it on.

Aster (Gastertale Papyrus): Definitely some kind of weakness for tahini. It makes such a good dip, or spread, or partner with jam on toast to make a not-quite-pb&j, so even though he doesn’t usually find it on a menu, he tends to keep some around the house. Would he eat it all by itself? Has he? Well, what’s the fun in just telling? He has some kind of mystique to maintain, you know…

Spectr (Transcendtale Sans): Ketchup is super nostalgic for him, a very comforting flavor. He’ll totally drink it straight or eat it out of a packet just for the taste of it, even if he doesn’t have the hunger to actually eat it with something. He’s also gotten a bit more adventurous, though, and is a lot more open to trying different varieties of ketchup, and those trendy combos with other things—spicy ketchup, mayochup, thousand island—if it’s available, he’ll try it, and he’s slowly amassing a personal catalogue of favorites tried all across the globe.

PapAIrus (Transcendtale Papyrus): He doesn’t eat. He doesn’t need to and he’s not actually capable of it, so… It’s fine, he really doesn’t miss it or think about it much. …But whenever he gets around to having that back-up body made, probably the first thing he’d eat with it is a big jar of peanut butter, the crunchy kind.

Xanth (Ascendswap Sans): Having almost completely done away with any sense of shame and a large amount of awareness of social norms, he is no longer shy of straight-up eating relish. He is also not shy of going for maximum sour, vinegary flavor and will fully sip pickle juice out of the jar. He is living his truth and we are all so proud.

Piper (Ascendswap Papyrus): Did I call somebody else a hummingbird? I should’ve saved it for him, he’s graduated from honey to something a bit more concentrated—agave syrup. He follows the trends a little more attentively these days, gave it a try when he heard about it as a honey-substitute, and that was…kind of it. His sweet tooth is his weakness, and he doesn’t even mind paying a little more for the ethically sourced brands, he’s too hooked on that super-sweet sweetness for his tea and candy and pastries and whatever else he can find to drizzle it on.

Carmine (Underfell Fruition Sans): He’s a cool ranch guy, all the way. As a dip, it’s the perfect accompaniment to anything crunchy and he’ll freely load up his carrots and celery and chips with it. As a proper condiment, it’ll go on anything from pizza to burgs, and while he’s definitely taken a swig once, just to try it, he probably likes it better as supporting cast than the lead act.

Tank (Underfell Fruition Papyrus): He was ruined the first time a jar of marshmallow fluff came into his possession. He didn’t get much in the way of sweets growing up, so pure, soft, sticky sugar…? He has no defense against it. He’ll actually need to be told you can make things with it if you want to, because eating it with a spoon is all he knows and that’ll be a beautiful brave new world for him.

Vi (Swapfell Fruition Sans): He’s a barbecue sauce fan. His preference is for the smoky or spicy kind, but even the sweeter stuff has its charm and he hasn’t really eaten a kind he hasn’t somewhat liked. He won’t take a swig from a bottle, but if he ever comes across a brand he really likes, he may go out of his way to buy some to take home, and that's a huge compliment from him.

Hunter (Swapfell Fruition Papryus): Butterscotch is his thing, actually. He likes it as a topping in sauces and cocktails quite a bit, but if there happen to be any butterscotch chips around, that’s more to his preference. Be wary trying to get any baking with them done around him, he actually prefers them outside of the baked goods and he’s not above petty theft. In fact, he’s below it, far below it, a little quick yoinkery is the least of what he’ll do to get something he wants.

Kohl (Descendtale Sans): He’s a soy sauce kind of guy. It’s salty, savory, and strong, a little goes a long way even to overpower a flavor you’re sick of, but you have to eat because it’s nearly all there is… Yeah, he got a little hooked on it when monsters started eating the echo flower root, and it stuck around as a new favorite after. Would he drink it? Not unless it would be really funny, he has limited room in the tank these days and would prefer to use it for food he likes, not on a bit.

Bram (Descendtale Papyrus):  Nothing beats a nice crème anglaise drizzled over something sweet… Of course, he’s not much of a cook so mostly he just waits for vanilla ice cream to melt and that’s basically the same thing, right? Ice cream soup is delicious and also a perfectly valid topping for all manner of deliciousness, don’t knock it until you’ve tried it!

And as for comfort foods…well that’s a whole other post to update! ;)

[osleeplessflowero]

it's currently my birthday so here's some headcanons as to how i think skeletons would act/what they would do on YOUR birthday! (featuring a TON of au characters! :D)

Sans

Might be the one to push your face into your cake. It's a gamble with him. If it's not that, he'll definitely prank you somehow during the day (something lighthearted and fun, of course.) He wants to make sure you have a blast. I could see him getting you something funny, like a shirt with a funny phrase on it you could wear over and over.

Papyrus

He'd be the type to set up the party games, especially something like a Pinata to hit! He might hit it a liiiiittle too hard..but it's okay. Just means you get candy faster! He'd want to make your day something super fun to remember. He's dead set on changing things up each year to make each day memorable.

Red

WILL push your face into your cake, no questions asked. Provided you blew out your candles first (if you have any). He'd definitely want to take you somewhere fun for your birthday, messing with you from time to time to get a laugh. Definitely would want to get you something you could use a lot, or something you've mentioned wanting before. He keeps tabs on these things!

Edge

If he likes you a lot, he'll get you something really nice and insist you keep it taken care of, letting you know he cares in his own ways. Although he might not be as energetic as his brother might be on your special day, he still stays close by and ensures you're having plenty of fun. He's also one of the more rational members of the skeleton group, keeping the others in line so nothing goes wrong.

Blue

INSISTS on being the person to wake you up. He wants to be the first person to tell you but deep down he knows someone else beat him to it during the night, but that won't stop him from enthusiastically singing the Happy Birthday song anyway! He's probably the one to prepare you for an exciting day of fun, planned out with your best interests in mind. (His brother helped out of course by slapping some fun stickers on the schedule.) He might be one of the first people to give you his presents, letting you open it earlier in the day with him present.

Stretch & Rus

These two pretty much share a braincell, so naturally they'd race to be the first to send birthday wishes right at midnight. Funnily enough there's never an exact victor, they always send their messages at the exact same time. During the daylight hours, they stick together to cause plenty of chaos to get smiles and laughter out of you. They might pull a few pranks to tease you, but nothing too far of course. Rus would make some really cool art as a gift for you, anything you could possibly want him to draw or paint. As for Stretch, he'd work with Blue to get something you'd be able to have plenty of fun with (and of course, to use together).

Black

Oh does this man SPOIL you. He'll take you anywhere you want to go, no matter the cost, ensuring you he'll handle everything for your special day. You name anything, he'll get it for you right away. Also one of the men in charge of keeping the others in line so nothing goes too crazy. At least, until alcohol's brought out..then he leaves it up to Edge. ;)

Mars & Jupiter

The Horror bros are a bit less energetic when it comes to your birthday, opting to do something more personal for you. They'd give you their gifts alone so only they get to see your reactions. Jupiter would probably be the one to bake your cake in the first place, shooing everyone else out of the kitchen so he can perfect it. (Soo much spoon smacking..) They'd definitely steal you away a few times during the day to have some relaxing time together. Mars doesn't really like crowds..but he'd be willing to stay in a room with everyone for you.

[Berry is on his best behavior..just for today.]

Stepping out of the Neighborhood AU and into the Multiverse...

Dream, Ink, and Blue(again)!

Dream is SUPER excited for your birthday! He made sure to figure out all your favorite things so there's plenty of joy and positivity. Ink made sure to set up a really nice area for the three of you to celebrate, and maaaaybe set up some sort of water/paint balloon fights for some fun. Blue is in charge of activities and making sure Ink's chaos doesn't get too out of hand!

The Bad Sanses

Killer makes sure to be the first one to wake you up, singing the happy birthday song enthusiastically to embarrass you. Dust and Horror will be a bit more calm than he is, messing up your hair and giving you little affectionate/friendly gestures. Nightmare sets up a grand party for you, decorating the castle to the very best of his ability. He'll do his best to make things absolutely perfect for one of his favorite group members (don't tell the others, especially not Killer!). They all made sure to pitch in and get you some things that you'd thoroughly enjoy (just don't ask WHERE they got them from, okay?)

Error

He might have kidnapped you. But you're usually cool with it so it's okay. He's not particularly crazy about the idea of a big extravagant birthday party, so he sets up a day where you can spend time together watching your favorite shows in the Anti Void. As for his gift? Well, I could see him making some little puppets for you to have, maybe one of himself so when you hug it you'll think about him. (And since he's still adapting to physical touch himself.)

Cross

Cross wants to spend as much time with you as he can on your birthday. He's not one for big, extravagant things, but he would do something personal and sweet for you to make you happy, just content to spend time making you feel special. He might take you stargazing or something similar, a fun thing for both of you to do.

Bonus!

Fresh! (i will write about him at least once i swear. platonic fresh enjoyers this is for you)

You already KNOW Fresh is on top of things when it comes to his best bud's birthday! He'd definitely bring you somewhere where you both would have plenty of room to mess around and cause some chaos. No where is safe! I could see him dragging you to something like a skate park or to go spray paint some stuff. Or maybe to go see a movie together you can both laugh at. If he can't hang out with you alone, he'll show up at the Star Sanses' party to surprise you there.

[skelesunderthetale]

What makes them happy

Characters: Sans, Red, Blue, Dream, Nightmare, Ink

🎡 Undertale (Sans): He’s a simple guy. The kind to try and appreciate every moment. What makes him happy is probably also the most important thing for him: his family. Nothing can make Sans smile more than a nice hang out with his brother, either it be at home or going out for some food. Papyrus is always there to chit chat with him, and he likes listening. But all of the above can apply to his special someone… Underfell (Red): Another simple guy! He likes when someone thinks about him, in general. Obviously, he very rarely felt that way considering his universe is the contrary of kindness. It did happen, long ago, that his brother would make cards or handmade gifts for him. It’s the fact that those things were directed to him that made him so happy. Now, any kind of attention towards him makes his soul skip a beat. Underswap (Blue): Holidays, his favorite thing ever. He just absolutely adores seeing everyone gather up, naturally happy and appreciating each other's company. Any kind of event that includes him welcoming people to his home, cooking and providing for them. He loves feeling helpful and making others feel at ease. Blue likes the simplicity of holiday joy, that’s when he feels the happiest. Dreamtale (Dream): Similar to Blue, of course he likes helping others, it’s his duty and reason to be alive. However… We all have a selfish side, and his selfishness created the fact that what makes him happy is getting favors in return. Not anything life threatening, just a task to assign someone in return for his protection. He also likes being pampered. He takes care of everyone, why can’t somebody hug him too? He’d very much like that, and he deserves it. Dreamtale (Nightmare): Now why would he want to be happy? He hates it and hates everyone in this stupid post. Kidding. Sadly for him, it makes his soul tingle a bit in happiness when he gets something new to read. He especially likes those big spined books, with shiny writing and sometimes embroidery of uncommon color. He’s also a fan of classic old decor, as long as it’s dark enough. He likes his environment, that’s what makes him… Satisfied.

 ___tale (Ink): It’s confusing him. Sometimes he likes things, and other times he hates said things. But something he obviously likes is art. Art is so vague, it can represent anything, it can even make the worst soulless ink-made skeleton in the universe relate to an ambiance or sentiment. It doesn’t need to be happy to be beautiful, and neither does he. That’s what he likes so much about it.

[rinky-dinky-dink]

Star Sanses But There's More Of Them

Always seemed unfair to me that it was always the three Stars vs 4-6 Bad Sanses (depending on if you include Error and Cross). So I gave them more! Adds to the dynamics I think. These guys don't follow any specific timeline or anything, so everyone gets to be friends and do silly things.

Typed-out blurbs under the cut-

Dream - The Leader

Probably some kind of angel

Honestly so tired

Recovering people-pleaser

Best Ink Manager

Done hoping for things to be okay - he will make things better or so help him-

Ink - The Menace

"Protector" god Dream found in the dumpster

Just here to have a good time

Morality dictated by Dream and the spray bottle

Lowkey the strongest one here

Got that 'tism, baby

Blue - The Cool One

Functional and productive member of society

Way less naive than he lets on

The glue holding this team together

Just a genuinely nice guy

Believes in his friends, even when they don't believe in themselves

Red - The Edgy One

Severe resting bitch face

Not as angry as he seems

Bit of a nervous wreck

Feels stable compared to everyone else

Self esteem in the gutter, but he's improving!

Sugarplum - The Wine Aunt

Also a functional member of society

Smooth talker of the group, along w/Dream

Will listen to you vent and talk shit about your ex

Second best Ink Manager

Yes queen, slay

[cloudyskydreams]

Heeyyyy can I request how would skeletons would react if the reader walked up to them and said “oh i can take you” and they would say “in a fight right ?” And the reader is just smiling silently how would they would react?

Hii I know you as the resident papyrus lover lol. Thanks for requesting sorry it took so long to get to it! This one was fun and Blues kinda got away from me lol. My cat would NOT stop bothering me for pets while writing this,

Undertale:

Sans:Laughs it off. He gets what you mean and he thinks it's pretty funny. "heh that's funny kid" Might blush lightly as he imagines it for a second and it's kind of out of nowhere depends how much you caught him off guard with it.

Papyrus: Has absolutely no clue what you mean. "TAKE ME WHERE HUMAN?" Just stands there confused as you smirk at him. You gotta be a bit more vulgar to get this one flustered he's a little oblivious y'all.

Underswap: Blue: Absolutely understands what you mean but pretends not to because he thinks it's funnier. "I WOULD BE MORE THAN HAPPY TO TRAIN WITH YOU!" He's got a innocent look on his face but he'll definitely remember how sure you sounded about how you could take him when he has you pinned underneath him begging.

Stretch: It takes him a second but he chuckles and gives you his best flirty look as he blushes carrot orange. "im sure you could honey" he's a bit flustered as he wasn't expecting it and thinks about the scenario the rest of the day.

Underfell:

Red: Also takes him a second but he smirks big when he gets it and gives you a hungry look "ya wanna find out if ya can doll?" He's 100% taking that as an invitation the horndog he is and will be more than happy to see if you really can take him.

Edge: He rolls his eyelights but smirks and pulls you closer. "Are You Sure About That Pet?" he whispers right in your ear causing you to shudder. He gently nips your earlobe before he takes a step back and simply walks away leaving you in shock.

Horrortale:

Axe: Has to think about it for a solid minute before he's chuckling. More than willing to take you in a fight or bed. "heh I dunno bout that… lamb" he thinks you're cute approaching him and saying that outright. Definetly writes this interaction down in one of his journals and chuckles over it when he reads them over.

Willow: A bit more aware than Papyrus so he gets what you mean and his entire skull flushes pale range. "Oh…" A little surprised you'd want him in general he's flustered, shocked, honoured, and a little bit horrified all wrapped in one. Quickly absconds but is lost in thought thinking about the interaction the rest of the day.

the fiend herself

[stellocchia]

The best thing about my three all-time faves is that they absolutely could be friends.

I talked in the past about Killer and Lust having plenty of similarities (they both come from situations where violence was normalized to them, their souls and emotions were messed with against their will, and they both tend to be objectified a lot, with Killer being seen as a weapon and Lust as a sexual object). But also, they have plenty to give to each other. Killer can teach Lust how to defend himself better and Lust has a lot to teach him about self expression, individuality and so on.

They're a great duo already, but I can make the dynamic better by throwing Red into the mix.

My guy comes from a world that doesn't fit among the darker AUs like HorrorTale, DustTale, or Something New, but it doesn't fit among the lighter ones either. Violence was very much normalized there and he's used to being a weakling compared to those around him. Nothing but easy EXP (I don't doubt that he and his brother had come to rely on one another a ton during their time in UnderFell. Those two are codependent af and nobody will ever convince me otherwise).

He can empathize with Lust's and Killer's feelings of being something other because he was. However, he cam also teach them a lot. He can teach them how to stand up for themselves (because, while Killer knows how to fight, that guy is the worst advocate of his own boundaries), and how to truly trust. He'd be out there helping to reconnect with their bros (and maybe helping Color too since we're at it, because if Killer's there Color is never too far behind) and that's a hill I'm willing to die on.

Also, my brain gave me the name "shades of love trio" for them and it fucking slaps, so one more reason to make them buddies

[haveyouseenthisskeleton]

All skeletons

I NEED TO KNOW WHICH ONES CAN PURR AND WHAT MAKES THEM PURR

All skeletons can purr, they have the physical capacity to do it. Do they want to though?

Undertale Sans - He usually has a very good control on his purring and it's extremely rare you hear it. One way to make him purr is by petting his head while he's deep asleep. But he's rarely deep asleep and all the other times he might just stare at you in confusion lol.

Undertale Papyrus - Too much praise. It's rare though as Papyrus never lacks praises, but sometimes too many praises are too much and he blushes, purring loudly. He hates it though.

Underswap Sans - It's extremely rare and only when he's so happy he loses complete control of himself. His purr is also very low so it's hard to tell he is purring.

Underswap Papyrus - He's a big purrer and he doesn't hide it. When he's happy, he likes to show it. His purr is not that loud so it's hard to tell when he is, but he is, often.

Underfell Sans - Only in private and when he feels really really safe with his S/O. He doesn't want anyone else to know he can purr, think of his reputation.

Underfell Papyrus - Even though he will act like that never happened, Edge can sometimes purr when you're flirting with him. It's never for long though as he's very self-conscious about it and will do all he can to hide it, including throwing you by the window.

Horrortale Sans - He's not purring, he's making tractor noises. Oak purrs for all sorts of things, very loudly. When he wants attention, when he gets attention, when he's happy when you looked his way for two seconds... He's not hiding it. He purrs so loud that sometimes his brother has to take you to another room to have peace lol.

Horrortale Papyrus - Even though he hates it, his body instinctively mimics his brother's purr sometimes lol. He has no control over it and it makes him curse every time because he doesn't know how to stop it???

Horrorfell Sans - Only when he worried and you start petting him. It helps him to calm down. He's not purring other than that.

Horrorfell Papyrus - When you praise him, it can happen. But he immediately starts to cough to hide it because, duh, of course, he doesn't purr what are you imagining?

Horrorswap Sans - It might happen once or twice when he feels very comfortable, but other than that, he's not purring. He has other ways of showing affection.

Horrorswap Papyrus - That's one of the last sounds he can make without his jaw so he will certainly use it as often as he can. It's his way of saying "I'm fine today". It can be more or less loud with what he's trying to say.

Swapfell Sans - He can sometimes purr in his sleep, but that's his max lol. Don't you ever call him out on this because he will bite you and fight you.

Swapfell Papyrus - He purrs when he's flirty. It makes his voice more cavernous and sexy. Well, he thinks at least. It's not working that much in reality lol.

Fellswap Gold Sans - He can purr but you'll never catch him alive. Maybe one time in a coma, but that's all lol.

Fellswap Gold Papyrus - He has a low purr for long cuddle sessions. It means he feels very safe and happy right now, which is actually not that hard.

Outertale Sans - It can happen when he feels a bit lonely. It helps to soothe himself. Moon has a bit of separation anxiety.

Outertale Papyrus - He's purring to make the children he's looking after sleep for their nap. It's working really well!

Dancetale Sans - Only when he's half asleep on your lap and you pet his head to make him sleep.

Dancetale Papyrus - He purrs rarely, but it can happen once or twice when he's really excited and happy. He's self-conscious about it though and quickly grasps a hold of himself so no one notices.

Dancefell Sans - He doesn't purr often, but not rarely either. He loves having attention and he's favorite things ever is the shower of kisses. He starts to purr hard when it happens.

Dancefell Papyrus - He purrs very rarely, mainly when he's having a very good time.

Farmtale Sans - He can purr. But you'll never catch him alive either. He's a very secretive guy. Maybe after a few years of deep relationships, but it will be a one-time experience.

Farmtale Papyrus - He purrs rarely, he's too shy to assume it. Usually, it happens for ten seconds and then he stops himself and blushes deeply. He might do it longer if he's really comfortable around you.

Mafiatale Sans - He has a spot on his neck that activates the purring. He hides it really well though so good luck to find it.

Mafiatale Papyrus - Nah, he's not going to show you. You can barely see any expression from him in the first place, so a purr? Never.

Mafiafell Sans - He only purrs when he's with his dogs. He loves his dogs. You're not sure if you should be offended or not.

Mafiafell Papyrus - He never purrs except in bed with his S/O while he's... You know.

Ink - He doesn't have enough focus to relax and purr, sorry. His brain is working 200% every second of his life so no time for purring.

Error - He only purrs when he's eating chocolate. He never eats chocolate in front of anyone so chances are you're never hearing him purr.

Disbelief Papyrus - Like Papyrus, intense praising is what send him into purring mode. He's resisting better to your attacks though, so it's harder to get him.

Killer Sans - He's purring when you're praising him. It's not that hard. He likes attention. He likes attention so much he won't let you go before two hours so you can continue praising him.

Dustale Sans - Uh... He purrs randomly, mostly at times he's staring at you intensely without blinking like he's going to hunt you down. It's not cute, it's scary.

[skeletonh0e]

The boys in heat

Extremely self indulgent UT Sans x Reader, US x Reader, UF Sans x Reader, HT Sans x Reader, and UL Sans x Reader. Talks of impregnation, breeding and a lot of overstimulating. AFAB Anatomy but pronouns are gender neutral. NSFW obvs

No trigger warnings I think? Some minor blood & cnc play with Horror Sans + cum inflation with Underlust Sans but that's it

🔞 Minors DNI

Classic Sans :

Awkward is the best term to describe him during this time, Sans does not like being out of control of his body in any form and his heat especially as it progresses is gonna be an experience to say it lightly

Generally hard to be easy and laid back when your body is not uh....not that

He deliberately does not tell you about it, avoids sex like the plague, and is just generally acting weird, until you either put the pieces together or he genuinely thinks he might pounce on you at any moment

He personally admits he normally rides these out alone and doesn't know how he'll act around a partner

Now that you're here though, things are different

A brief chat mainly to ease him into it as you genuinely trust Sans regardless of what pheromones are doing to him

Once things get started well? It is a lot

Sans had previously been attentive during sex don't get me wrong, however he just kind of treats it like anything else he does. Chill and laid back.

During his heat? He's clingy, impatient and needy, going for several rounds at a time, begging to pump you full of his cum, groping at anything and everything.

Naturally rougher as a result, though it's less intentional and more out of sheer desperation because even without extreme horny brain you turn him on so fucking much

"sorry baby i can't help it-" being said as he fucks you through your fifth orgasm of the day, he's cum inside you many times at this rate but his body screams for more and for more of you specifically

When he does tire himself out or manage to calm his urges enough to think properly he does help clean up, order take out and cuddle. The occasional pun here or there, "i'd make a dick joke but that'd come across as cocky wouldn't it"

But per usual cool down periods do not last for that long, you have woken up before with him grinding against you nearly whimpering as he needs another round

Never been extremely heavy on dirty talk, but he's a lot more quiet during his heat cycle outside of grunts and moans. When he does speak it's normally making sure you're okay, praising you, telling you he's close.

Occasionally he'll mumble things to himself likely things he didn't mean to say outloud, stuff like how good you're gonna look knocked up, how much he wants to fill you right now, and that he wants to breed you so fucking bad

Kinda...protective in a way he just isn't, even when he isn't balls deep inside you. Hovering over you, attending to your needs outside of the bed room attentively, and on the off chance you need to speak with someone else. He is there, as if waiting for the moment he's needed to intervene.

Definitely some nesting behavior, that's pretty endearing.

Underswap Sans :

Does tell you about it beforehand, blunders a bit, sort flustered, but he wants a gameplan before anything else and he did not want to risk scaring you off.

You get the whole run down, how long the cycle lasts, what to expect, the likely good if a kid happening, etc, etc.

You start out very informed and you do prep for it accordingly, though Sans did insist that you could just sit this out as he is aware he becomes a lot during this period

And boy howdy was he not fucking joking

This man has some serious energy, combine that with his over energetic nature in general and his need to please you feel like you're basically rendered into his personal fleshlight as he pounds into you over and over

Anytime he cums, he simply just doesn't stop. Still hard and thrusting into you like jack hammer, as if the previous orgasm was just a little hiccup.

Don't worry he's just as eager to please you as he is himself

Sans has always been a bit of a worshipper in the bedroom regardless of who's on top (you two switch it up quite a bit), he really gets off on just knowing he's making you feel good and likes to praise you cuz he looooooves you

He's sickeningly sweet sometimes and on his heat

Every orgasm you have is getting milked outta you

He'll happily play with with clit and tits while pounding into you, man handling your form in passionate manner. Anything to make you moan louder and cum on his cock again

Very chatty too, not that he was ever quite but it's full force here. On and on about how pretty you look stuffed with his cum, how you're so tight, how he wants to never stop and how he's going to keep making you feel so good

Due to his high stamina cool down periods almost like never happen, he will still stop and tend to your needs when you're hungry or tired but he has a raging hard on the entire time.

You work on a compromise of him jerking off and cuming on your nude form either when asleep or utterly wrecked with your over flown pussy needs a break

Which while at first he doesn't seem that thrilled about the idea, changes his mind as he really likes the idea of you being covered and marked in his scent.

It's less out of jealousy and more out of pride to mark you a deliciously nude way

Underfell Sans :

Would have told you about his heat....if he remembered

You're both kinds thrown for a loop by it, you more than him honestly. But thankfully you at least knew monsters did have heat cycles so it wasn't as out of nowhere as it could be

Though at first it did just seem like just Sans but hornier

Sans seems to have two main moods that be flip flops in-between, VERY aggressive in which he fucks you with malicious almost violent intent telling you that he owns your pussy, that you're his little fuck doll and he's going make sure everyone knows it

And a big massive softie that's extremely sweet and lovey dovey to you. Something that was normally only happened in very small doses or when he's utterly shit faced

It's not just praise but adoring you, talking about how much he loves, you that he's lucky to have you, how he just knows you're going to make a great parent

The whiplash is real, especially since sometimes he'll change his tone half way through fucking you. It's never entirely clear what sets either side off, other than occasionally his sweet side normally happens once he's cum once or twice

Very...possessive during it all, constantly rambling about how you belong to him and he'll kill anyone that even thinks about doing this to you

You don't know how much he'll actually act on that threat, but it's probably a good thing that neither of you are able to get out much.

But frankly while he's like this he would be willingly to fuck you someplace public tbh

So. Many. Fucking. Hickeys. You're covered in them by the time it's all over.

Cool down periods he does his best for after care, but like....he's very quiet. Almost like he feels guilty, especially at the sight of all the bruises you have. Which you will have to reassure him that he didn't cross any lines and that you liked it

"you're really some kind of freak ain't cha?"

"Your freak."

Horrortale Sans ;

Primal and animalistic are the best terms to describe him while he's like this.

Before the famine heats were no big deal, now however the term "wanting to fuck like animals" has never been more accurate

Sans never told you he got them, but you learned about them via other monsters so you were prepared on some level and even a little intrigued

Once a monster sets his sight on a mate, they'll frequently hunt them or fight off any other possible suitors. And given how you and Sans like to play Prey and Hunter, this allows you take things up a notch

The moment you know he's gone into heat, you run, you hide and he comes after you. It's a hell of a thrill, especially since you know it guarantee a better pounding once he finally gets you

You shifting around in the forest, sneaking around before you hear a husky voice call out "i know you're here sweetheart-"

You attempt to book it the other direction but the only thing you can comprend is a simple phrase before you're pinned to the ground

"gotcha."

The way you're fucked is brutal, he's never been gentle really but this is something else. Your entire body quakes with his thrusts, you're screaming as his cock is jammed against your g-shot and nearly rendered to tears from it all

He bites too, not just bruising you but definitely drawing blood then lapping it up with the same feral hunger that he fucks you with

Not very talkative, mostly just growls and groans. Only occasionally barking out "mine" or a "you're not going anywhere sweetheart" if you attempt to squirm away from him

Not that you really want him to stop but the struggle turns both of you on, he likes working for it and you like driving him up the wall to be honest

You're brutally fucked outside, clothes ripped off you, covered in bloody bite marks, pussy full of his cum, on the verge of passing out until he seems to either we decide to let up or is tired himself. He'll drape his coat around your naked form then carry you back to his place

If anyone attempts to stop him they're killed on sight, this is his mate and no one gets to touch them during this time.

When you wake up there'll simply be a low growl of "told ya you weren't going anywhere" before the cycle continues.

He does halt to care for you, you're his mate after all, but again weirdly silent throughout most of it.

It'll be a while until he's more chatty again, it's best to reassure him you were into his somehow more violent and extreme side of him.

Underlust Sans ;

Literally just his entire personality dialed to his natural extreme

Also doesn't think to tell you simply because he forgets it's not a common thing and to be fair it takes you while to notice

It's not until you're ten round today that you ask if something it up as while yeah he's got serious stamina and loves to fuck normally his dick would be a little soft by now

"Babe please tell me you didn't take some monster viagra-"

It makes him laugh before he breaks it down for you but also assures you there's no shame in tapping out and that monsters down here have ways to handle this without a partner

You take it as a challenge especially as he tells you it's not a challenge

It's one you enjoy though

The shift is his personality are far more subtle, rougher, a bit more dominant, and extremely fixated on pumping you full of cum. Like extremely fixated on it.

And whether it's the heat or some other factor you're not accounting for he cums a lot more than usual. Sometimes you'll just pinned down feeling his cock gush waves of his seed for several minutes as it fills you up.

He praises you through it all, telling you how good you are for him, how you take it all so well, and reassures you when it's almost done.

Your stomach looks more than a little bloated with it glowing with all the magic he just pumped into you and he definitely has a toy blog that helps you keep all of it in there

When you need a break from getting your pussy filled, anal play and oral keep you mouth entertained. You try swallowing his massive load but you end up having plenty spill out then the rest paint your body

And Sans looks super smug after wards the entire time

Definitely likes to tease you when he can, "bet you've never been fucked this good before huh?" said playing with your overstimulated clit while your whole is still plugged with a belly full of HIS cum

Having the most control over himself and already being a king of after care you're pretty much set when you do need a break for real

But you can't help being cheeky when you two are cuddling then you feel his erection rising up again

"You having fun?"

"i dunno it's a little hard."

[ficzers]

Hello, could you please write headcanons on how underfell sans would be as a boyfriend?

𓊆ྀི❤︎𓊇ྀི ⁀➴𓊆ྀི❤︎𓊇ྀི ⁀➴𓊆ྀི❤︎𓊇ྀི

𝔻𝕒𝕥𝕚𝕟𝕘 𝔽𝕖𝕝𝕝 𝕊𝕒𝕟𝕤:

𝔾𝕖𝕟𝕖𝕣𝕒𝕝 ℍℂ𝕤

𓊆ྀི❤︎𓊇ྀི ⁀➴𓊆ྀི❤︎𓊇ྀི ⁀➴𓊆ྀི❤︎𓊇ྀི

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♡ - Would try his absoloute hardest to look cool infront of you. Would be that one guy who makes his voice lower and try to act all chill when he’s around someone he likes. Would get mad whenever someone makes him look uncool around you, ESPECIALLY papyrus

♡ - Would call you tonsss of dumb pet names and tease you with it 24/7, but would get super embarrassed if you call him any terms of endearment

♡ - While most AU sanses would be ready to dish out the love but be flustered to get it back, this guy would be a stuttering mess over any actual romantic stuff you two do

♡ - Would try to be a *tiny* bit more polite when he’s aroud you, but it usually doesn’t work

♡ - Would actually be the sweetest guy ever to date but most of the time he’s too lazy to actually do said sweet things, he would be like “hmmm, I should make them a full course breakfast in bed of all their favourite foods… yeah, that would make me the best boyfriend ever, I’m gunna do that!” then lose all motivation as soon as he pulls out one ingredient

♡ - Would be very defensive and protective of you and goes overboard with it a lot, would literally curse out people in the street if they even so much as look at you funny. You have to stop him from making scenes lol

♡ - Secretly loves all the super cute stuff he can do as your boyfriend, would buy those matching plushie sets and those little heart bracelets, but would rather die than ever admit it to anyone

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