Men financially dependent on their female partner cheat more often, while financially dependent women look elsewhere less frequently, says a study on income disparity and infidelity. "Today, researchers have issued an alert to women: Beware of the man who makes much less than you. Also: Beware of the man who makes much more than you. These are signs that he'll cheat, according to a study that finds a link between income disparity and infidelity. Study author Christin Munsch suggests this might have something to do with the masculine ego. 'At one end of the spectrum, making less money than a female partner may threaten men's gender identity by calling into question the traditional notion of men as breadwinners,' she said."