I like the use of the flatworm, which says that "males can function as females because their penis got chopped off".

I think the 'males pretend to be females to get inside the defenses of actual females so they can have their way with them' is even better.

OP knows the difference between sex, gender, assigned at birth, and actual sex. He's just choosing to conflate the terms because he is engaging in sophistry and rhetorical warfare.

Clownfish males apparently switch sexes too when their mate dies. Still not proof of Trannies being natural.