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EP 188 — Christopher Ryan: Sex and Relationships

Spirit Gym with Paul Chek

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Polyganous Harem Base Mating System in Gorillas

In gorillas, there is a polyganous harem base mating system where you have one alpha male and he has several female that only he can have sex with. This results in some interesting issues in terms of the evolution of the genitals in gorillas versus other species. It turns out that when only one male is having sex with the females, evolution favors the development of big muscles like fangs or horns. But it often results in a shrinkage of genitalia. So a gorillous penus is the size of your pinky finger, fully erect, because there'sno sperm competition happening. Whereas with bonobos or chimps, or, i've argued, humans, there

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