She worded it poorly, as in "yikes, that's bad" but the answer there is to teach her son to have standards.
Men used to have standards in who they married and had children with. It's documented. They didn't actually attempt to plug every vagina they crossed paths with. Men gave up standards in the quest of sex quantity over quality. They gave up a lot more too and they're suffering the effects of that now.
But there's only so much she can do as his mother. Culture holds a lot more sway over our children than we'd like to admit.
Men are going to flounder here until the cumture of masculinity changes back to something more reasonable and not detrimental to men's psyche.
Even then, there's two parts to this equation and there's something toxic rising in the culture of femininity. If we don't get it in hand, and soon, men could straighten the.sekves out only to find themselves in the exact same position many women have found themselves in....being an absolute catch with no or too few truly marriageable men available to you.