Why Humans No Longer Have Spiky Penises

Were it not for evolution, sex could be a pretty uncomfortable prospect. But fortunately for humans, the male penis evolved in one particularly nice way: it lost its spikes. Some animals, including chimps and mice, still have penises dotted with hard spines. But Stanford researchers have discovered one particular chunk…

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Why Humans No Longer Have Spiky Penises

Posted by on March 10, 2011. Filed under News, World News. You can follow any responses to this entry through the RSS 2.0. You can skip to the end and leave a response. Pinging is currently not allowed.