Sexual perversion is a part of the destruction of society described in “Brave New World”.
Been that way for all of recorded history and it follows the same trajectory as the various empires. Newly liberated slaves establish a close knit agrarian society, those which are virtuous have more success than their neighbors and a nation forms around this success. The nation expands, and soon has to fight more and more wars in order to keep up with the demands of a larger, resource consuming populace, until it is an empire... then the rot sets in.
Men having sex with willing women is perversion?
I reckon goats and kids and other men qualify as perversion.
Willing women? Not so much.
Heterosexual sex is perversion?