i think that this disease is related to compulsivness, same as with people who have to drink coffee in the morning, or have a cigarette right after a meal, or like one must have a drink when times get bad.
some people eat cause their bored, for other's it's cause they see themselves skinny. i think that people are trying, but the fast food industry just keep coming out with new fattning food to try..
my two cents....