An appeal to biology, and conjugality. Two sexes, one union. So is coitus the best way to reproduce?<quoted text>
An appeal to tradition is a logical fallacy. Just because something's always been done a certain way doesn't necessarily make it the best way.
But you aren't interested in a logical argument, are you?
They who? How do you know people were distinctly identified by same sex sexual behavior? Seems odd for something so "innate", that it took until the late 19th century for same sex sexual behavior to be given a medical term.So they called gay people something else besides 'homosexual' before the late 19th century.
It could mean that despite the existence of SSSB, and individuals who engaged in such, there was no compelling reason to designate it as a basis for a distinct identity.That doesn't mean they didn't exist.