According to journalist Susan Dalgety's Substack (a good read), the author Philippa Gregory, who has sold gazillions of historical fiction novels, thinks there are more sexes than we first thought!
https://susandalgety.substack.com/p/philippa-gregory-may-be-a-bestselling
Here is the quote from Dalgety:
"Philippa Gregory, who prides herself as a feminist, does not believe in the “myth of two sexes.” She writes glowingly of a modern world where it is impossible to divide humans into two categories, male and female. “It is as fictional as a sorting hat – we are more diverse than and more varied, and more changeable over time, in a richer multiple word than the binary model…” And she points out that in the 1990s, American sexologist, Anne Fausto-Sterling, counted five sexes (male, female, merm, ferm and herm), while French scientist Eric Vilain suggested an “infinite number of biological genders.” It was at this point I dropped my coffee cup."
And yet again with the tedious trope that in order for people to be interesting and the world to be diverse, we must dispense with the fact of the sex binary by which every single human has been produced, ever.