I agree with Bill Maher in principle, but I know folks who are way overweight and see the struggle they go through to lose weight. One friend in particular was actually a professional baseball player in his younger years and now weighs over 400 lbs. He's continually on some kind of diet and works at a sports club so is always working out. Me on the other hand have always ate and drank pretty much what I want and have always had a fairly slim physique. It's like some folks are just predisposed to weight gain.