Why is it okay for women to enjoy anal play but men get called gay?

I just saw someone say that it's gay for a man to enjoy anal play but now this person say she enjoys anal play. Why is it seen as gay for men when their prostate is in their anus? It's hypocritical for a woman to enjoy anal play but automatically will call a man gay if he enjoys it also.

*I am not naming the user. I'm using it as an example.