He's probably referring to the myth of two-spirit people among native Americans. And he is right that it was applied to ancient civilizations, but only starting in 1990 when LGBT natives wanted to have a way of distinguishing their LGBT-ness from everyone else's. Because they had to be the specialist of snowflakes (yes, that's not a term that was around in the 90's, but if they can apply a new term to their past then I'll do the same to them.)
He's probably referring to the myth of two-spirit people among native Americans. And he is right that it was applied to ancient civilizations, but only starting in 1990 when LGBT natives wanted to have a way of distinguishing their LGBT-ness from everyone else's. Because they had to be the specialist of snowflakes (yes, that's not a term that was around in the 90's, but if they can apply a new term to their past then I'll do the same to them.)