See... We DO feed him! Believe me we do, and he doesn't resemble a starving Ethiopian child in any way. He was sucking in his nonexistent gut, trying to be funny. Trying. This kid has the metabolism of, um, well, I'm not sure what, but something that has super-de-dooper fast metabolism! (Feel free to make suggestions for my sad attempt at comparison.)
I also tried to get him to flex his guns, but he refused. Brian would have done it! So, why is Grant so morally opposed to showing off his muscles? I mean, he IS wearing a muscle shirt!! Geesh!