Why did humans evolve big penises but small testicles?
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We have the penis of a monogamous primate yet our body sizes suggest our ancestors slept around a lot.
Why Did Humans Evolve Big Penises But Small Testicles?
Does Size Matter? Evolution and the Primate Penis
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Large testicles are linked to infidelity
Why Did Humans Evolve Big Penises but Small Testicles? — Gayety
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One Testicle Bigger Than the Other: Causes and Complications
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The Reason Why Men Have Nipples
Why did humans evolve big penises but small testicles than other apes? - Quora
