Marie the sharp biological division between men and women comes from a variety of sources
No shit.
De Beauvoir quite famously argued that there is no such thing as sex, only gender.
She argued no such thing. She explicitly states that there's no such thing as an 'abiding gendered self'. There is a clear, albeit implicit gender/sex distinction running throughout that text; the same kind later picked up in power, discourse and performativity (which otherwise wouldn't have been able to draw on its ideas). If its subtler nuances have somehow escaped you, I'd recommend you reread The Sexond Sex.
Do they really let you loose on teaching undergraduates? God spare us, no wonder the HE system is in such a state.
Your Freudian slip is slowing
A really relevant, clear, well thought out and engaging contribution to the discussion. Well done!
I thought so, too. A witty, amusing, non po-faced contribution! Made me laugh.
NB. Rapidly-Googled posts are obvious from a mile off.