I think it’s based on strictly enforced gender roles and the way women are sexualized. Anyone who goes against those sexist norms is giving them a feeling of "wrongness". Add the sexual stuff on top of that and the result is going to be disgust.
Also being confronted with the fact that your sexuality isn't so set in stone when you find out an attractive person is trans. Norms fucking people up and making them have a normal one.
I think it’s based on strictly enforced gender roles and the way women are sexualized. Anyone who goes against those sexist norms is giving them a feeling of "wrongness". Add the sexual stuff on top of that and the result is going to be disgust.
Could be wrong on that though.
Also being confronted with the fact that your sexuality isn't so set in stone when you find out an attractive person is trans. Norms fucking people up and making them have a normal one.