Prof. Lionel Tiger points out a few interesting things and provides some canny observations:

Historically, women prefer to marry men who are slightly older and wealthier than they are, if for no other reason than to have an available breadwinner during the five to eight years the average mother withdraws partially or entirely from the labor force. And 85% of women have children, which explains the factoid that women earn 77% to the male dollar. It's accurate only in the literal sense, since women are forgoing annual increases for significant years or electing to take part-time jobs to raise kids.

Women can control their reproductive lives, which is as it should be. But to coin a phrase, men are becoming alienated from the means of reproduction, which presumably no one wants.

Is there anything to be done to reverse this trend? A good first step is for women to ease up on the patriarchy yammer, especially when it comes to romance: Ideology has no place in the nation's bedrooms.

Here, here!