Hi Confusedkitten. Wow this seems like a hard thing to hear from a boyfriend. If I were in your place I would definitely feel confused and kind of aghast. There is definitely a strong taboo around this particular thing. A parent is essentially in a position of power over a child. It is clearly abuse, despite his age IMO. He says it doesn't bother him, but it's something he should talk about with a therapist. As for what you should do? Should you stay with him? My reaction would be no. It's what he engaged in, yes, but more so that he doesn't see the issue with it. (?) Listen to your gut and your heart. As I say to most people, listen to that inner voice. Your feelings are valid.