What goes in must come out. It's that simple. But what does it all mean? Therein lies the mysteryand the key to your health and happiness. In this entertaining and fact-filled guide, the authors of the best-selling expand their probing inquiry into the workings of the human body to reveal the secrets and splendors of farts and pee, as well as more about their inevitable companion, poo. In the shocking and informative final section, the authors explode a variety of popular myths about the gastrointestinal tract. After reading this book, you'll never think of your bodily functions in the same way again!