Has this kind of freedom happened before in history?

Here's a question for my more historically-informed friends: do we have a chance to enter into an unprecedented era, in which gays are treated equally to straights, AND women are treated equally to men?

I mean, when I think of times in history when homosexual relationships were considered acceptable, I think of places like Athens, which didn't allow women to be citizens. Indeed, I have trouble thinking of times and places where gay marriages were treated as the same as straight marriages -- of course they EXISTED, but I can't think of times where they had the same official recognition. And in the places where gay relationships had SOME form of recognition, they were often seen as BETTER than straight relationships, because women were considered to be less than men.

I have this gut feeling that treating straight and gay relationships as the same requires a culture in which all sexes are treated as the same. In order to consider a woman marrying a woman to be the same as a woman marrying a man, you have to consider a woman to be the same as a man.

Is this the first time in history where we've had the chance for this to happen?