The usual formula for Sherlock/Jim fics is that Moriarty rapes an unwilling Sherlock (or has someone rape Sherlock while he watches), but I want a lovely spin on the idea.

Sherlock manages to get a hold of Jim and rapes him. I'd like Sherlock to be the creepy guy most associate with Jim, while Jim very much does not want what's happening (not because he doesn't like Sherlock, but having sex with him was not on his to-do list). Pretty much a role reversal of your typical Jimlock rape fic.