Eating junk food and fast food is a great all-American passion. American kids and grownups love their candy bars, Big Macs and supersized fries, Doritos, Twinkies, and Good Humor ice cream bars. The disastrous health effects from the enormous appetite for these processed fat- and sugar-loaded foods are well publicized now. This was particularly dramatically evidenced by Super Size Me (2004), filmmaker Morgan Spurlock's 30-day all-McDonald's diet...