That may have been true once, but no longer – there are no shortage of ways for queer couples (or, for that matter, infertile cishet couples) to have children.
Even if we assume that reproductive categories are so supremely important that we should socially categorise based on them (which I reject), that just brings us back to my original point. Why are infertile people still categorised into a binary sex that has nothing to do with their reproductive capability?
Because sex as we culturully underatand it is socially constructed. We use markers that don’t reflect reproductive reality. Perhaps once they were the best proxies we had for a guess at reproductive capacity, but not any more.
Nope! Sperm has been synthesised effectively from egg and used to fertilise another egg. Successful birth with this method has been achieved in animals, in humans birth has not yet been tried, it’s slowed down due to regulations
Your textbooks are clearly outdated. That’s fine, sociology and gender theory evolve. Read some queer theory, in particular Judith Butler.
It’s not just about terminology, it’s about the social constructs that are inexorably linked with that terminology. It’s not overcomplication to point out that only a tiny fraction of observable sex (fertility) is actually immutable, and even that won’t be for long. All others are both mutable and socially chosen to represent sex.
I do mind, sorry, my points aren’t linked to any particular country or culture and so I wouldn’t want you categorising them as such, intentionally or not.