Another noticeable pattern is that these identities can be transitional for some people who spend a part of their lives within them, perhaps even to the point of the entire identity being treated as at best transitional. IMO this has a lot to do with implicit sexing and social-sexual economy.

Pederasty traditions in general seem to have a lot of historical and featural overlap with third-sexing and with conventions around transfemininity (I argue that they do even today in the West).