What did these two ladies mean?

I overheard a conversation at work and the two ladies were saying: the one lady was bitching because her just turned twenty something son is dating a woman in her late thirties.

And the other lady laughs and says “she thinks she can train him like the men used to do the women. You can’t train a man.”

What did she mean by “she can train him like the men used to do the women?”

🤔