Contrary to textbook claims, the human penis doesn't stand out from the primate crowd, speaking against a role of sperm competition. https://www.karger.com/Article/Abstract/488105 …pic.twitter.com/Vojv5JxsKj
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Thanks. What I had seen most recently http://blogs.discovermagazine.com/crux/2018/02/14/sperm-win-animals-mating/ …
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