What is it with seven years? You break a mirror, seven years bad luck. Each dog year is seven human years. Seven years to digest swallowed gum? What if a dog broke a mirror and then swallowed a pack of gum? Sounds like an algebra problem.
Chewing gum is not digestible but it definitely doesn’t sit in your stomach for years. Gum actually might help things move through the bowels faster: Sorbitol is sometimes used as a sweetener in gum and this can act as a laxative. What does this mean? Yes, if you look carefully, you should see it floating next to all of those lovely yellow corn kernels.
Excerpt from Why Do Men Have Nipples? by Mark Leyner and Billy Goldberg, M.D.