New York Times columnist Charles Blow discovers a new engine fueling the War on Women: having female loved ones makes men more sexist. Apparently, being around women they love causes males to notice average differences between men and women, and Noticing, as we've all been warned, leads to conservatism.

The problem with having your message powered by machismo is that it reveals what undergirds such a stance: misogyny and chauvinism. The masculinity for which they yearn draws its meaning and its value from juxtaposition with a lesser, vulnerable, narrowly drawn femininity. 

We have seen recent research suggesting that men with daughters are more likely to be Republican and a study finding that men with sisters are more likely to be Republican. *

The study of men with sisters was conducted by researchers at Stanford Graduate School of Business and Loyola Marymount University. A report from Stanford about the study concluded, “Watching their sisters do the chores ‘teaches’ boys that housework is simply women’s work, and that leads to a traditional view of gender roles — a position linked to a predilection for Republican politics.”

Also, in 2012 65.0% of white men with wives voted Republican compared to only 50.6% of white men without wives.

It's almost as if the wives, daughters, and sisters of men are poisoning men's minds against the truths of feminism, which are so much more obvious to males sitting alone in their parents' basements.

Seriously, as Henry Kissinger has noted, there will never be a final victor in the Battle of the Sexes because there is too much fraternizing with the enemy.
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* Here is statistician Andrew Gelman trying to work through the puzzles of how to test for these effects without measuring something else, such as propensity to have larger families.