I agree, and also, when it comes to dating, almost everything about hetero dating revolves around who's The Man and who's The Woman. That's probably contributing to the non-binary trend.

100%. Sex is seen as something men do to women.

Women get fucked/banged/shagged etc

Men “make love” to women, not with them.

The woman is passive, she has things done to her.

Hetero sex is not presented as equal. And hetero norms are imposed onto LGBs so that w/w get asked “which one of you is the man?” 😐