I'm not sure it's even a bug, it's just a small mistake. In Zo's sex scene where she propositions after training, the game assumes my character has never had sex before because her hymen is intact and her butt is "unspoiled". She has, in fact, had plenty, it just didn't involve dildos or dicks, so it sounds really silly when the narration goes on how this is her first time and so on. Which I really appreciate, by the way, that this even taken into account and changes the scene, it just probably should look at a different variable than hymen/butthole status.