There are many more sluts than playboys.
And women have many ways of satisfying the badboy they are *ahem* "dating" (that week, or the last-six-weeks) which will not result in either abortion (an abomination before God) or in children with pathologies and a vast increase in social spending.
The real question is, why aren't other WOMEN slut-shaming as they used to?
But I think you already know the answer to that.