Historically it’s because of heirloom. Therefore it’s often more accepted if men cheat, because you always knew who is the mom, but not who is the dad. That somehow carried on with peoples insecurities. On the other hand I can imagine that in some places the woman are happy if the guy would take care at least about one kid.

I’m also happy with my wife doing whatever, as long as she is doing it responsibly. And I know that she is.