What do you consider to be the most taboo fetish?

Personally I think it's either guro or pedophilia because it involves hurting someone. Even though not everyone accepts other sexualities like pansexuals or scatophiles or necrophiles, they're generally ignored or accepted (not really sure about the necro doe). Hell, I mean Mozart was into scat *from what I've read, though I can't know for sure* and that didn't really affect his reputation. I suppose that sadists would kind of classify as guro lovers in ancient times and it was accepted that men would enjoy to torture, but I think now that any fetish that involves mutilation or hurting of other people.

To those who have exposed their secret fetish, I'd like a bit more detailed explanation of how that went. (Personally, I consider that I'm into guro, but telling a girl that I fantasize about putting a slug through her chest while fucking her would prooooobably not go well)