#you'd find him in corrupt government in the evil wizard's lair and anywhere there are vulnerable women to prey on

[torchwood-99]

"'...How long is it since Saruman bought you? What was the promised price? When all the men were dead, you were to pick your share of the treasure, and take the woman you desire? Too long have you watched her under your eyelids and haunted her steps.'"

Gandalf to Grima, The King of the Golden Hall

Never forgetting that the reason Grima Wormtongue turned to Saruman was because he was lured in with the promise of being able to rape Eowyn. Eowyn was offered to him like bait and he took it.

Wormtongue was a monster before he turned to Saruman. A man with basic decency doesn't turn traitor because he was offered the chance to force an unwilling woman to marry him.