From poisonous snakes and toads to glass and gasoline, the "menus" of these individuals with pica are astonishing. In the 16th century, a woman in England reportedly consumed a book every day, treating it like a meal. In China, some people eat glass, bricks, coal, and even drink raw cottonseed oil. What secrets lie behind these behaviors? French sailor Juanlec never drinks water, while an American girl eats banknotes. How can their bodies endure such peculiar foods? What physiological or psychological mysteries are hidden behind these quirks?