[Melpomene]

Because men, as a general rule, make ugly women. And if the character is ugly, chances are it will be harder for audiences to accept the idea that nothing is wrong with it. But if you put two hot chicks together, then you’ve got lipstick lesbian sex, and that’s cool, bruh!

[a fool in paradise]

Because feminist lesbian audiences are not going to go see a movie about two "women" if one is played by a man, no matter how good he is.