For a bit of context I(29M) have been with my girlfriend(25F) for 2 years, she knew an ex that she describes as abusive and manipulative. We are very open, she told me a lot about her sex life with this guy because it would have traumatized her enormously, he was very hard and humiliating in bed with her, he used her only as a toy etc.. She always told me that sex with him was horrible, that everything he did was horrible and that in 3 years with him she hadn't had an orgasm.

So far nothing problematic for me, we've set limits from the start and I've been careful never to go too far, to be careful about what she wants or doesn't want etc etc etc. But last week she confessed to me that she'd love me to use her as a toy, then started describing everything she wanted and how being "humiliated" and "used" drove her crazy. Except she literally quoted me everything she'd told me she hated and that her ex was doing to her.

But since then I've been feeling bad and don't know how to deal with the situation. In fact, everything she said appealed to me and was part of my “normal sex practice”, but I don't really know why, but I've got this bitter aftertaste in my mouth. Every time I think about it, my libidos shut down completely and I don't want anything more.

I feel like I'm in complete cognitive dissonance, my mind is hype and horny but my body is sending me every possible warning signal, would you have any advice ?