Is Obesity Contagious? Authors Explain How Obesity "Spreads"

Duh.

Researchers out of Arizona State University recently published an article in the American Journal of Public Health titled "Shared Norms and Their Explanation for the Social Clustering of Obesity". It looked at why obesity seems to be common in some families and groups of friends.

Along the lines of the old saying, "Birds of a feather flock together," the study showed that people do cluster according to size, but few clues explain why.

Apparently even a drift of pigs has a mutual support system.