I realized that the idea of gender as performance, something that you do rather than are, is disliked by some trans people, as they argue for a kind of inner identity. This also overthrows the idea of gender as social construction, very much a feminist theme 30 years ago, well, still is.
This raises the question of possible biological foundations for trans, an area which seems to be in an early phase, research on twin studies, and so on. Julia Serano is pushing this, as she is a biologist, and trans, her book is interesting, "Whipping Girl".
Well, you could say there is confusion in gender studies, I guess it will calm down, but it has been confused for 40 years!