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I think this is happening to me. Although I'm not trying to gain weight having so many large friends on-line is causing me to grow bigger and bigger... and I like it.
http://www.nytimes.com/2007/07/26/health/26fat.html?_r=1
People are more likely to become obese when a friend becames obese. That increased a person’s chances of becoming obese by 57 percent. There was no effect when a neighbor gained or lost weight, however, and family members had less influence than friends.
It did not even matter if the friend was hundreds of miles away, the influence remained. And the greatest influence of all was between close mutual friends. There, if one became obese, the other had a 171 percent increased chance of becoming obese, too.
