Armchair Expert with Dax Shepard Justin Garcia (on the science of sex)
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Feb 11, 2026 Justin Garcia, evolutionary biologist and Kinsey Institute director, studies the science of sex, love, and fidelity. He talks about how human sex ties into social behavior. He compares primate mating systems, explains dating app choice overload, and shares stories from brothel hormone research. He also explores pandemic effects on relationships and why intimacy feels so messy.
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Humans' Social Release From Reproductive Constraints
- Humans are uniquely socially released to have sex year-round and for pleasure, unlike many animals with strict physiological mating windows.
- This social coupling of sex and relationships explains why human sexual behavior is unusually flexible and culturally variable.
Pandemic Strengthened Many Marriages
- Kinsey Institute studies during COVID found most married couples improved their relationships despite reduced sexual frequency.
- Couples reported increased variety and experimentation even as overall sexual frequency dropped.
Limit Options And Invest In Dates
- Limit choices when using dating apps and commit to meeting people instead of endlessly browsing.
- Prioritize second dates and invest attention in each person you meet to increase satisfaction.
