Yeah, I've never been a porker my whole life.  So I'll admit I'm ignorant on the eating thing.  I just look at eating two chicken breasts and a cup of wild rice and think "damn this will fill me up!".  Then I see someone over there chowing down on two double cheeseburgers, a shake and extra large fries like it's a light snack.  I guess I'm just getting caught up on the percieved "volume" of food.