fatness is contagious

[snagglepuss]

i just saw a blurb on cnn about fat people being contagious.

apparently 57% more likely if good friends with a fat person.

any truth to this? is it just a byproduct of the fact that fat people are more likely to congregate among themselves to begin with because they have similar fat lifestyles?

here is the first story i found while googling

what other personality or lifestyle traits would translate in the same manner, assuming this research is relatively correct?

being a douchebag? being funny? being intelligent?