>>508399837 (OP)Sex and pleasure are to serve natural purposes, they aren't just for you to indulge in.
Before Christianity, Aristotle was already talking about how people can have a twist desire towards an object of pleasure (thus being akolastos when they believe this twisted desire is right, achkthually). Since the end (teleios) of sex is reproduction, and it's penis in vagina, rubing one's penis in another man's asshole is a disorganized desire to say the least.
On top of that faggots are really fucking disgusting so there's that too.