There is not much on gay coitus in the NT, and if you ignore all but the gospels, there really isn't anything at all (in the NT). (religion.blogs.cnn.com)
Hence the spilling of semen for any nonprocreative purpose — in coitus interruptus (Gen. 38:1 - 11), male homosexual acts or male masturbation — was considered tantamount to abortion or murder. (religion-online.org)
But like all of Anderson's work, the current film seems best described as coitus interruptus — congress interrupted at the moment of climax by the director's peculiar fixation on mendacity in favour of the supernatural. (filmfreakcentral.net)