I've noticed many times,that most thin guys are usually tall or average in hegiht. It's less common for a thin guy to be short. It's pretty lame imo. they are lucky enough to be short,and yet they want to be chubby? that's very stupid of them!
Because short people eat just as much as tall people (regardless of how short you are, a Subway footlong is always going to be 11 inches long, a McDonalds quarter pounder is always going to contain a quarter pound of who-knows-what, etc) - even though their smaller bodies don't need as much. And then when they put on weight, it's spread over a smaller frame.