"Eating junk food is not a reward - it's a punishment!"
I just read that from the back issues of newspapers collected while I was gone. It was in the interview he did for the Parade Magazine the 26th September 2010.
It may not seem like a "secret" but I think it is, for me, because it was something I was secretly hiding from myself. I'd go oink out on some high calorie junk food as a "reward" and then wondered why I felt so bad afterwards! But Drew just blew it out of the water!