Alright, I suppose I should also ask are you fine with things like that happening to other party members, even if they don't happen to you?<br/><br/>What I think I'll do is just theme attacks and effects differently depending on what the player's willing to do.  For instance, one monster might have Charm Person as a spell-like ability (with a few modifications, since the monster can't generally communicate).  On characters willing to be affected by aphrodisiacs, it might act like one, making them much more willing to let the monster rape them.  On a character that's not willing, it might instead be some kind of hypnosis instead; same general effect, but different theme.