Heat maybe? Hair in general helps trap heat, and in the rainforest that’s not so helpful. Hot and humid I imagine you want that sweat to evaporate as fast as possible. All the airflow.

I’ll agree someone saying they are are a girl/boy or trans isn’t sexual. Gender isn’t inherently sexual. Someone being gay/straight feels like it’s absolutely sexual. Implied with the"sexual" in homo or heterosexual. You could have nonsexual gay/straight thoughts/feelings I guess, but those are just feelings. Like, ANYONE is allowed to have them regardless of orientation, and honestly sounds like it’s bordering on asexual. Do you have a learning example for that line of thought? Before any angry blowback: I’m not trying to be a dick about this. As far as my understanding of this goes, I don’t follow that comment.