I don't know if I can answer the question properly. I've definitely known more than a few gay men who make a big show of expressing disgust at heterosexual sex, like that "evens the score" or something.
if you restrict someone based on their heterosexuality, you are. It's kinda funny but technically heterophobia can exist, and does, despite not being many reports on it
if religion never existed, we wouldn't even have to have this conversation because religion fueled hatred towards human sexuality and shaped society on how it is today