Anybody who’s smoked marijuana knows about “the munchies,” that desire to eat everything within reach. But a study from France has found that, surprisingly, pot smokers are actually less likely than non-smokers to pack on weight. Using data covering more than 50,000 U.S. adults, researchers headed by Yann Le Strat, a psychiatrist at the Louis-Mourier Hospital in Colombes, France, found that roughly 14 percent to 17 percent of the people reporting that they smoked pot at least three days per week were obese.