My son is skinny, and he is a couch potatoe. My daughter is heavy, and very active. She just eats a lot more than he does.
my best friend can eat and eat and eat, and I mean a bowl of cereal in the middle of the night kind of eating, and never gains a pound...
I hate it, but I guess its that motabalism thing... I lost mine when I gave birth, and I havent been able to find it agian