Dr. Aaron Spitz is among the top 2% of male infertility experts in the country and the author of the most informative and accessible book on men's health: The Penis Book: A Doctor's Complete Guide to the Penis—From Size to Function and Everything in Between. His trademark wit makes men feel at ease with even the most uncomfortable topics, which is why he's often featured in the media, such as the Netflix documentary, The Game Changers, The Doctors, and more.