The title says it all. It's yucky. It's gooey It makes your food chewy Ptooey Ptooey Oh, spit. Ew Nasty Ew Gross But spit is no spitball joke. Drool is cool It's one of the most amazing fluids in your body. In Spit, renowned science writer and children's author Mary Batten examines everything that's cool about drool. Spit keeps your mouth moist. It begins digesting food the minute you take a bite. It...