Heterosexual men mentally melt in the presence of attractive women. As Tom Jacobs writes in Pacific Standard, even the very thought of possibly interacting with a woman is enough to "temporarily impede men's mental abilities." Of course, women know this, and some use it to their advantage. (Companies also know this, and they use it to their advantage, too: During my years in graduate school, many of the biotech sales reps were unusually attractive women.) Men feel more trusting toward women who cause them to be sexually aroused, even if there is no good justification for it -- just like...