Justin Garcia (The Intimate Animal: The Science of Sex, Fidelity, and Why We Live and Die for Love) is an evolutionary biologist, researcher on sex and relationships, and Executive Director of the Kinsey Institute. Justin joins the Armchair Expert to discuss the unique quality that human sex is so tied to our social behavior, the physiological constraints on mating in other animals, and how sexually we are like magpies. Justin and Dax talk about why gorillas have really small testes, how the pandemic resulted in couples weathering the storms of relationship conflict, and an evolutionary explanation for how difficult it is to choose mates on a dating app. Justin explains how collecting hormone samples at a brothel in Las Vegas led him to write his book, why there’s no requirement to enter a relationship fully healed, and the social science behind love, partnership, fidelity, and heartbreak. Watch the Justin Garcia Fact Check, now as a standalone video: https://youtu.be/3wIfmIvXhco Watch Armchair Expert episodes: https://www.youtube.com/playlist?list=PLzPEuwClyOzDdlrAmU-IwKncG87qrF7Vw Follow Armchair Expert on social: https://www.instagram.com/armchairexppod https://www.facebook.com/ArmchairExpPod/ https://twitter.com/armchairexppod Connect with Wondery https://wondery.com/shows/armchair-expert-with-dax-shepard/ https://www.facebook.com/WonderyMedia https://twitter.com/WonderyMedia https://www.instagram.com/WonderyMedia https://www.tiktok.com/@wonderymedia About the Show: Hi, I’m Dax Shepard, and I love talking to people. I am endlessly fascinated by the messiness of being human, and I find people who are vulnerable and honest about their struggles and shortcomings to be incredibly sexy. I invite you to join me as I explore other people’s stories. We will celebrate, above all, the challenges and setbacks that ultimately lead to growth and betterment. What qualifies me for such an endeavor? More than a decade of sobriety, a degree in Anthropology and four years of improv training. I will attempt to discover human “truths” without any laboratory work, clinical trials or data collection. I will be, in the great tradition of 16th-century scientists, an Armchair Expert. Watch Armchair Expert every MONDAY, WEDNESDAY, and FRIDAY here on Youtube! Listen to episodes ad-free by joining Wondery+ in the Wondery App, Apple Podcasts or Spotify. Start your free trial by visiting https://wondery.com/shows/armchair-expert-with-dax-shepard/ Chapters: 0:00 - The Scientific Sex Talk 9:22 - How Sex Research Became a Real Field 15:50 - Sexual Flexibility in Nature 19:40 - Forming an Institute to Protect 27:30 - The Covid Sex Boom 32:30 - Modern Dating and Decision Fatigue 50:25 - Studying Hookups and why Foreplay Matters 51:51 - Unrealistic Expectations 58:00 - A Crisis of Intimacy 1:05:24 - Modern Monogamy 1:18:51 - Open Vs Closed Relationships 1:31:08 - Heartbreak is Real, Literally #armchairexpert #daxshepard #justingarcia #scienceofsex