On this week’s episode of The Waves, Slate senior producer Cheyna Roth is joined by author Gabrielle Blair. Blair’s new book Ejaculate Responsibly presents the radical idea that men should take control of the fertility conversation by better managing their sperm. After all, they're fertile 24-hours a day compared to women’s 24-hours a month. Cheyna and Gabrielle also talk about the problem with not prioritizing women’s pain, Gabrielle’s history as a “Design Mom” and how even Mormons seem to agree with Gabrielle’s book.  In Slate Plus: How the pope got involved in your birth control. Podcast production by Cheyna Roth with editorial oversight by Daisy Rosario and Alicia Montgomery.  Send your comments and recommendations on what to cover to thewaves@slate.com Learn more about your ad choices. Visit megaphone.fm/adchoices