Actually, in my younger days I was one of those people you wouldn't like; the skinny guy who could eat and eat and eat...and not gain an ounce. I weighed 155 when I graduated college, and not an ounce of fat. My average McDonald's meal was a Big Mac, not one but two Quarter Pounders (with cheese, of course) a large fry and a medium coke.
If I was hungry, I'd get a hamburger too.