Am I being selfish

I decided I never wanted kids when I was 12. I'm now 25 and my opinion hasn't changed. My husband of three years wants kids more than anything and as I said, I'm not keen at all. We still have plenty of time as I am still young but he's getting really frustrated about it and has even questioned and threatened our marriage.

He's very into philosophy and psychology and he has a favourite famous psychologist (jordan Peterson) who says most women want kids by the time they're 30, even if they've never wanted kids their while life, most of them change their mind. So I always tell him that, that I'll probably change my mind and that he should have a bit of faith in me but am I just being selfish? Or is he being a twat for trying to force me?

I always thought if he really lived me then I'd be enough and he wouldn't need kids.