Christopher Ryan is an American author best known for co-authoring “Sex at Dawn: How We Mate, Why We Stray, and What It Means for Modern Relationships” with Cacilda Jethá, a New York Times best-selling book. Chris Ryan’s work has been featured in numerous publications, including Netflix, HBO, MSNBC, NPR, The New York Times, The Times of London, Fox News, CNN, Playboy, The Washington Post, Time, National Geographic, Newsweek, and The Atlantic. Chr...