Following on from Episode 3.19 on sex toys with Hallie Lieberman, this week we talk to clinical psychologist Dr Eric Sprankle about the history and science of masturbation. We talk about the not-so-sexy origins of graham crackers and Kellogg’s Corn Flakes, bizarre conspiracy theories about porn, semen retention myths, and the Founding Father who thought math would keep you from touching yourself. Does masturbating fight fascism? The answer might surprise you! Eric’s new book is DIY: The Wonderfully Weird History and Science of Masturbation.