I think I’d tackle it completely differently OP. What your ds is lacking is perspective and maturity and understanding.
So I’d build on his understanding of the history of oppression in general. Women, ethnic minorities, homosexuals etc.
then I’d tackle what it means to be a woman in 21st century western society.
I’d endlessly talk to him about the experience of women through the centuries - the rare examples of women and cultures that bucked a trend of general oppression . Id research with him how some cultures oppress women today. I would teach him about the patriarchy and religion and the “science” that has been used to justify women’s oppression.
what it is like to experience life as a woman? How do we define “woman”?
Id talk about periods and pregnancy and childbirth and breastfeeding and motherhood and menopause. in detail. The good, the bad and the ugly. If he doesn’t want to hear it then he shouldn’t engage in the debate. It’s relevant.
I’d talk to him about childlessness when you didn’t choose it, hysterectomy, and troublesome hormonal cycles. I’d talk to him about the fear of unwanted pregnancy. And the fear of being groped at work, or raped on a date. The dilemma of dressing in the way you want when it appears to be “asking for it”.
I’d talk to him about ALWAYS thinking twice before you take a walk alone, get onto a bus or a train.
id talk to him about sexual comments when you walk past a building site, unsolicited dick pics and the ogling of young girls. Of slut shaming and fat shaming.
Id talk to him about why wearing skirts and long hair and high heels doesn’t make you a woman. Why lesbians are concerned they may be required to accept women with penises and the problems this presents for our whole community.
and so on.
id listen to him and I’d ask him to listen to me
it is only through education and understanding that we can all learn and grow and find solutions to these really difficult issues.