This is a set of cultures and subcultures originating in the stone-age-like societies found in the [asian] temperate forests. It has originated in the Xa and the Bám species, and is therefore the oldest multisophont culture in the world of Total Convergence..?.
They highly value plants and nature, and excrements aren't thought of as something negative. They view them as a way for nature to reclaim what was taken from it.
To them, gender is an unfathomable concept. In societies influenced by this culture, there is nothing that substitutes it. Even though there are individuals that we could classify as "transgender" by our standards, their self expression is limited to surgeries and medical treatment, if desired.