How did I get so fat?

http://www.mercurynews.com/mld/mercurynews/living/health/14649129.htm
It seems so counterintuitive to say it is natural that fat people would eat a lot at McDonalds. Why? Well, let's think about this a little bit. Where to start. Would you not think it would be the people who truly enjoyed food the most would be the ones who had the largest size? Yet when you meet a true connoissuer of foods most savory, they frequently are among the most slender. At the same time, people who think a Whopper is living the good life because it is broiled, not dipped in grease and microwave, they tend to be the largest.
Think about it for a second...isn't that backwards? The people who truly, truly ENJOY their food...who know the difference between chicken under glass and chicken heated under glass would be larger? I am confused...