Greek culture lacked any binary distinction.

I'm no expert on the subject, but reading Plato's dialogues lately, the Athenians of the era just before Alexander had no preclusive prejudice for gendered relations. That said, the human demographic in Plato's dialogues is very much biased towards the upper class of society, and I believe that has always slanted towards social exception through hierarchy, with a special place for the rogue aberrant who strings the bow of dogma at the edge of the tribe.