OK, there's warning out on this show. We're going to talk pretty graphically about the digestive system, about how Elvis died, about flatulence, about roughage, and fecal transplants. Most of the time we will be dispensing useful medical information. But there's also something funny about digestion. In fact, there's a lot that's funny about digestion. And Mary Roach, the author of "Gulp!" is both a prize-winning science writer and a person who cannot stifle her own amusement at some of the things she writes about. I guess I'm sort of admitting that this show may dip below the waterline of normal public radio standards. Actually, I'm probably admitting it will start there and dip further still. Unless you're British, in which case this will be the funniest radio show you've ever heard, right? Leave your comments below, email us at firstname.lastname@example.org, or tweet us @wnprcolin.