Things you can tell just by looking at him

Forget his feet. Look to his fingers to learn about what he's packing. In a recent study from Gachon University Gil Hospital in South Korea, researchers found that the greater the difference in size between a man's index and ring finger, the longer his penis was when fully erect. Before you get out a measuring tape, know that men with a similar finger-length ratio are also more likely to suffer from hormone-related diseases like prostate cancer.

According to a study by the University of St. Andrews in Scotland, men with wide faces are perceived as being less trustworthy than men with narrower faces. In a related study, men with broader faces were found to be at least three times as likely to lie or cheat in negotiations as men with narrow faces. The reason? It could be that broad-faced men are, on average, physically bigger, and have more testosterone. They can get away with being aggressive and uncooperative because they're the alpha dogs.

Size does matter—just not in the way you think. According to researchers at Erciyes University in Turkey, men with excess body fat last longer in bed. The reason? Guys who are a little soft have more of the female sex hormone estradiol in their bodies, which disrupts the transmission of male chemicals, and slows down their orgasms. Because they last longer, they can take their time stimulating their female partner, who on average takes up to 14 minutes to come to her own climax. In other words, ditch the six-packs and start looking for men with a little more girth.

Want to know pretty quickly what a man's political leanings are? Keep an eye on his gaze. Research from the University of Nebraska-Lincoln suggests that a conservative guy may be less likely to follow your eye movements than a liberal one's. During the study, liberals, who are perceived as being more concerned with the greater good than with themselves, matched the eye movements of a face on a computer screen, while conservatives, whose catch phrase slogan in the upcoming election is individualism, were almost completely immune to them.

Not only are clean-shaven men considered more handsome than men with beards, the authors of a study in the journal Behavioral Ecology say they're also more likely to be successful. One cursory glance at the Forbes list of the 100 richest people in the world reveals that out of the 86 men on the list, only eight of them sport facial hair. Why is this? Because we tend to trust people more when they are clean-shaven, say body language experts. Then why do 33 percent of American men still have facial hair? Because beards symbolize other traits: maturity, masculinity, a loft in Brooklyn.