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Why human men don’t have penis bones

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Walrus baculum penis bone
Walrus baculum penis bone

British researchers think they’re closer to an answer to why human males don’t have penis bones, even though their close cousins, chimpanzees, have them.

“Monogamy may have done away with the penis bone,” said Matilda Brindle of University College London, who led the study published in the journal Proceedings of the Royal Society B: Biological Sciences.

Humans have something that chimpanzees don’t have: marriage.

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