Why Do Men Have Nipples?

Why Do Men Have Nipples?, subtitled Hundreds of Questions You'd Only Ask a Doctor After Your Third Martini, is a humor/medical book written by Mark Leyner and Billy Goldberg, M.D., and is a New York Times Bestseller.

Mark Leyner is the author of My Cousin, My Gastroenterologist; Tooth Imprints on a Corn Dog; I Smell Esther Williams; Et Tu Babe; and The Tetherballs of Bougainville. He has written scripts for a variety of films and television shows. His writing appears regularly in The New Yorker, Time and GQ.

Billy Goldberg, M.D., is an emergency medicine physician on faculty at a New York City teaching hospital. He is also a writer and artist whose paintings have been exhibited in New York City.