Why they loves to fuck each others' back side and suck each others' cock? Is that normal?
Some people like that. It's a kink, like BDSM.
Go fuck a man, a woman, an animal, a doll etc. But if you demand that I accept what you do and that I'm a bad person if I don't, then you can go to hell.
Gay pride comes before a gay fall. Death to the sodomites and their enablers.