Well, devils advocate here, I'm agreeing with you, but when, when questioned about the games unofficial subtitle "The Date Rape" game, the game's creator apocryphally responded "who said anything about dating?", coupled with the fact that fatal has detailed rules on every sex act, concensual or otherwise, has you roll on a table to determine your character's "attributes", and literally has a spell designed to facilitate necrophilia, people tend to associate it with sex.
Though again, I'm agreeing with you. It's not bad because sex. It's bad because it's B-A-D