More Intersex things (NSFW Duh)
Your transfemme friends all have bigger dicks than you Ever had.
Dysphoria cuts both ways, and at random.
Deadbeat Puberty.
Muscle mass? What's that?
Tits and vagina have the right sexual response wired in, but hardware was not installed at the factory.
Straight cis girls have no idea what to do with a 'guy' who wants to have sex with them, but it's Lesbian Sex.
The very idea of binary gender becomes totally cumbersome and leads to internal angst and confusion for two decades.