In 2006, Jan Havlicek, director of the Human Ethology program at Charles University in Prague, set up an experiment in which he got young, college-aged women (who were not taking hormonal contraceptives — which could theoretically affect a woman's perception of scent) to smell a series of odor-infused swaths of cloth that had been worn in the armpits of similarly aged men.

The women were asked to rate the "pleasantness, attractiveness, masculinity, and intensity" of the sweat-infused samples. Turns out, Havlicek said, that they found the odors of vegetarians "more attractive, more pleasant, and less intense" than the meat-eaters.

— Read more in Do vegetarians smell different than meat-eaters? A strange encounter led me to find out at The Los Angeles Times via Yahoo.