Though I've still not had a chance (in the last few minutes) to look it up, I feel you're right. I know (from other research I've done) that 'we' (not me, but I guess 'humans') have found evidence of homosexuality in all sorts of REALLY old humans. I also remember (now that I'm thinking about it) finding that many places around the world of indigenous (but not yet 'civilized') tribes treat homosexuality MUCH differently than ... let's say newer religions.
Many treat it (if I'm not mistaken) as a gift from the spirits. Like getting to have two-souls, rather than one. And because there were/are so FEW, it was more of a magical thing, rather than an issue (cause gay people don't procreate so well).
Now, however, there is a bit of room for concern... At the VERY least in the frog population. 😉