#Pig uterus tastes like calamari (delicious) to me. And if human meat tastes like pig... I understand why he'd go after it.

[thepersonperson]

So the only way for a sorcerer to become a curse is I'd he dies by natural means right? And we know sukuna's whole thing is about food and eating and consuming, so what if his human life ended via starvation? (That would also explain why in the Heian era farmers and villagers would make offerings to him right? The natural disaster he embodies could be famine)

(Answered as of JJK 262 using TCB scans. Click images for captions/citations.)

Dying of natural causes is probably the least likely way for a human to become a curse. Strong negative emotions as one is dying can trigger the transformation. The negative emotions that become a curse can be from the person themself (Naoya) or another near them (Yuta cursing Rika).

Naoya is the go-to example of how improper body disposal of a sorcerer leads to someone coming back as a curse. A normal human killed him, he dies while holding onto a strong emotion (misogyny), and he has unfinished business (killing women).

All of the incarnated sorcerers (including Sukuna) are humans. They were turned into cursed objects to preserve their lives. If they were curses, Reversed Cursed Technique (RCT) would be impossible for them and they would die instantly to any strong RCT attacks.

Mahoraga mistakes Sukuna for a cursed spirit and uses pure reversed Cursed Energy (CE) in its first attacks to him. Then it adapts and swaps to CE to deal with him because that's more effective on humans.

But to your second question...

Someone else dissected Sukuna’s mummification and Buddhist symbolism in this post. To summarize, Sukuna's original body probably died by starvation via sokushinbutsu.

Sukuna was likely born starving as well. Since in this panel he talks about his starving mother and eating his twin to survive.

A little messed up theory of mine but I suspect it’s why he salivates over the prospect of eating children and women when first possessing Yuji.

The first thing he ever ate was a child. And if he’s this fond of women’s flesh, perhaps he ate his way out of his mother through the belly. His favorite things to eat are of the first two things he ate.

Anyways there was a famine during the Heian Period from 1181-1182 (Yōwa Famine). If we’re supposed to use historical dates when reading this text, we can assume Sukuna was either born around that time or he died around that time.

Seeing Sukuna as the embodiment of famine because of this makes sense. His favorite thing to do is eat and he doesn't ever seem to ever have his fill. He's not just physically starved too, emotionally he is ravenous. The hunger with which he pursues humans and sees them as meals in both the literal and metaphorical sense screams famished. That being said, I'm not sure other characters see him as such.

According to this video (which cites sources in the description), Heian Court Nobles truly believed that offerings and festivals to gods would solve all their problems. Since Sukuna was perceived as a non-human, aka a natural disaster, the offerings were definitely an appeasement. I'm not sure if it means they saw him as famine specifically, but I wouldn't be surprised if that was the case.