pelheit

I've yet to see a definition of gender that isn't based on restrictive and harmful sex stereotypes, or is circular and empty. It's not a helpful concept.

If you decide to redefine sex as a collection of traits, the problem with that is it's dependent on the specific developmental mechanisms of each species. Then the question is, how do you decide which traits are female and which are male? Especially in as yet undiscovered species. And how to classify species where each individual is both male and female?

The answer to all of this is to remember that sex is about reproduction, so it must fundamentally be based on gametes.

I think he means attempting to mimic some features of the opposite sex, with procedures like penile inversion and so on.