Pretty girls, unattractive men gel well

Women seeking a lifelong mate might do well to choose the guy a notch below them in the looks category. New research reveals couples in which the wife is better looking than her husband are more positive and supportive than other match-ups. The reason, researchers suspect, is that men place great value on beauty, whereas women are more interested in having a supportive husband.

Researchers admit that looks are subjective, but studies show there are some universal standards, including large eyes, "baby face" features, symmetric faces, so-called average faces, and specific waist-hip ratios in men versus women.

A group of trained "coders" rated the facial attractiveness of each spouse on a scale from 1 to 10, with the perfect 10 representing the ultimate babe. About a third of the couples had a more attractive wife, a third a more attractive husband and the remaining partners showed matching looks.

Overall, wives and husbands behaved more positively when the woman was better looking. Dan Ariely, a professor of behavioural economics at MIT's Programme in Media Arts and Sciences and Sloan School of Management, said, "Men are very sensitive to women's attractiveness. Women seem to be sensitive to men's height and salary."

In couples with more attractive husbands, both partners were less supportive of one another. McNulty suggests wives mirror, in some ways, the level of support they get from husbands.

"The husband who's less physically attractive than his wife is getting something more than maybe he can expect to get," McNulty told LiveScience. "He's getting something better than he's providing at that level. So he's going to work hard to maintain that relationship."