My boyfriend just revealed a fantasy that freaked me out. Should I tell him, or should I forget about it?

Sex is like food, there’s a smorgasbord of possibilities and we’ll like some options and be repulsed by others. There are bound to be some differences in taste between you and your boyfriend. If this fantasy is one he’s happy to keep in his head, that could be fine. We all have fantasies that turn us on but which we wouldn’t want to enact in real life. But if it’s something he wants to try out, then definitely tell him you’re not into it. If you were vegetarian you wouldn’t eat meat just to please him, so don’t do anything sexual that freaks you out.