I never though about this until now, but you know how people are always taking pics of every single meal they are eating?  It's gotta be some subconscious mentality that "my friends will be super jealous at seeing me eat this 1,000 calorie cheeseburger with fries"  its usually the fatties doing this, I deleted facebook but I always remember logging in every day and every other person on that friends list showed at least 3 meals per day, like any normal fit person gives a shit what you eat.