I have seen a lot of people going for food competitions, and I see how they eat very much on TV, leaving me extremely dumbfounded.

I had two friends when I was a teen, one was kinda fat and known to eat a lot, and the other was average and a bit shorter than average, and they made a bet who would be able to eat more pizza. To all of our surprise, the skinnier guy won! And kinda effortlessly to boot! Dunno where all that food goes. Maybe there's no sphincter separating the stomach and the intestines of these people!