Sure, but a cis man could also be dating a trans woman in any of these scenarios, and no one would say “heterosexuality” was what was preventing him from becoming a dad.
When people joke about lesbianism = no pregnancy, it’s because they’re assuming all lesbian relationships are between the same kinds of bodies having the same kind of sex.
First off, she could be a T4T lesbian or a cis woman in a closed monogamous relationship with another cis woman.
Second, many trans women have had orchiectomy or SRS. She could be in a relationship with one of us.
She could sleep with trans women and neither of them like penetration.
Sure, but a cis man could also be dating a trans woman in any of these scenarios, and no one would say “heterosexuality” was what was preventing him from becoming a dad.
When people joke about lesbianism = no pregnancy, it’s because they’re assuming all lesbian relationships are between the same kinds of bodies having the same kind of sex.