If you haven't seen this video, please make time to watch it. This is the Tom Naughton-sanctioned You Tube version, so please don't accuse me of being a video pirate.
If you are still in the brain-washed "fat makes me fat" category, you must check this out. It began as a rebuttal to Morgan Spurlock's spurious "Supersize Me," and took off from there. Here's the link: Fat Head on You Tube.