I was on a site called "Humans Menstruate". No my response was "Females Menstruate/have Periods. Period." But Dana Seilhan goes much much further...
Her Female/Feminist Logic is Impeccable.
"If you can get periods, you're not a male. That's just how human biology works.
"Gender identity" is a meaningless term. Gender is a system of sex-based stereotypes designed to keep males dominant and females submissive, at least in our culture. Saying you've made a discriminatory system into an identity is like a black person saying they have a slave identity. And if you were to interview a trans person and ask them how they "know" they're whatever "gender" they "identify" as, their laundry list of reasons will read like a list of stereotypes.
"I'm a man because I never wanted to play with dolls when I was growing up. I like being tough and I like football."
"I'm a woman because all I ever wanted to wear when I was a kid was dresses. I love pink. I love makeup. I love shopping for clothes."
Stereotype stereotype stereotype. Check and check.
A woman can wear whatever clothes she wants and go by whatever name she wants. That's fine. But personal preferences and personality differences don't determine a person's sex, which is what the trans contingent is really trying to claim. And I would think the existence of femmey gay men and butch lesbian women would be enough proof that you can "mismatch" your preferences/personality and your sex all you want and it doesn't mean anything's wrong with you.
Feminism's been teaching that for years. Maybe one of these decades it'll actually sink in."