...makes you fat.
New research suggests that your family and friends influance your weight. From an article on MSNBC:
Obesity spreads through social networks, according to the study, so if your friends put on weight, you’re more likely to put on the pounds, too. Your family members or spouse can also influence you; as they get heavier, you’re more likely to gain along with them. But, your friends—even if they don’t live anywhere near you—have the most sway. A close friend’s weight gain can even be downright dangerous.
But apparently only happens with same sex friendships and family members....
The study found a man’s weight gain would have no significant effect on his female friend’s weight, and vice versa, but the study did not have many male-female friendships to examine.
Gee - I wonder why? Perhaps they should hit up some gay clubs to further examine that connection....