Well, OK, that's true. I was wrong with "always".

It's only been the norm since we've had effective birth control, decent pregnancy and early-life health care, cures for most serious STDs, the notion that neither women nor children are property, what would nowadays seem like a reasonable amount of individual physical and social mobility and independence, certain knowledge of paternity, a less inheritance-based economic system where certainty of paternity isn't as overwhelmingly important anyway, and whatever else I'm forgetting.

But those are the new normal. Or at least one may hope they'll stay normal. And they've definitely been more or less normal throughout the lifetimes of anybody who's in this forum.