I am within the binary though, I am a transgender woman. I think again, in this conversation we are conflating so-called " sexual dimorphism," with the social standards that pertain to essentially anyone who is feminine.
See this proposed " sexual dimorphism" only exists within the context of society. It is not because I feel " I am supposed to have a vagina and boobs" that I am a woman, it is that my brain is fundamentally preconfigured to like the things that " females like." I put this in quotes because they are not intrinsic to the sex of female.
You see, the reason the vagina is attractive is because your entire life you are told this is the reason you are not what you know you are -- the gender identity of woman.
You're conflating all of this. It's not about sex or genitals. The only reason sex or genitals is involved is because the society we live in has constructed social roles, as well as masculinity and femininity, around sex and genitals -- and the reason this was done should be pretty obvious ( women are meant to keep up their appearance, men aren't. Women aren't meant to have jobs or passions other than housework and are meant to stay at home.) Etc. None of this is intrinsic to females, it is intrinsic to the enslavement of the female sex.
THIS is a social construct. If it wasn't a social construct it wouldn't change overtime; it wouldn't change from culture to culture. Hijab, flappers -- actually think about it for a second.

" What TerraElla is saying" is established Social-Science denial. You don't have to understand, nobody cares if you do -- you seem to support us anyway... But that whole " third gender" thing is asinine, and offensive as fuck. I'm a woman, transgender women are women that is all there is to it. Sure, they are transgender, but they're just women.

All you have to Google is " what is the difference between sex and gender" -- it's well-known information. What she asserted is the classic sexual dysmorphia talking point, but transgender people aren't diagnosed with sexual dysmorphia, they are diagnosed with gender dysphoria.
Please stop spreading misinformation about my social group.