Originally Posted by Austin
Originally Posted by Dude
I would relate this double-standard back to Victorian morality and explain how most of the educated world has moved on from it.

LOL. I think its ingrained into human nature and for good reason. It is present in all societies across time.

And its due to the fact that only women get pregnant. And that it also takes a lot of effort to raise a child. And women have to bear this more often than not. And that this has real costs that have large inescapable burdens.

This is an important reason for "double standards". Another reason is that men can be tricked by women into raising other men's children as their own, while this happens much less often to women, for obvious reasons. Philosopher David Hume discussed this in the 1700s http://www.humesociety.org/hs/issues/v23n2/levey/levey-v23n2.pdf .

The same logic explains why maternal grandparents are more involved with their grandchildren than paternal ones, on average.
http://www.sciencedaily.com/releases/2007/12/071218122412.htm
Family Ties That Bind: Maternal Grandparents Are More Involved In The Lives Of Their Grandchildren

The fields of sociobiology and evolutionary psychology shed light on the questions raised by the OP.

"To see what is in front of one's nose needs a constant struggle." - George Orwell