Why Don’t Humans Have Penis Bones?

1 year ago
Most other mammals have penis bones, so why don't we?

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Sources:
https://www.theguardian.com/science/2016/dec/14/why-dont-humans-have-a-penis-bone-scientists-may-now-know-baculum
https://www.scientificamerican.com/article/why-humans-have-no-penis-bone/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3650806/
http://rspb.royalsocietypublishing.org/content/283/1844/20161736
https://academic.oup.com/icb/article/56/4/644/2198249
https://academic.oup.com/icb/article/56/4/635/2198296
https://www.britannica.com/science/baculum
http://phenomena.nationalgeographic.com/2013/08/08/a-most-interesting-bone/
http://onlinelibrary.wiley.com/doi/10.1111/evo.12229/abstract
http://phenomena.nationalgeographic.com/2013/09/03/a-long-lost-bone/
http://onlinelibrary.wiley.com/doi/10.1002/9781119179313.wbprim0215/abstract
http://blogs.ucl.ac.uk/researchers-in-museums/2012/11/26/how-did-man-lose-his-penis-bone/
https://academic.oup.com/jmammal/article-abstract/63/1/1/868491
http://onlinelibrary.wiley.com/doi/10.1046/j.1365-2907.2002.00112.x/abstract
http://mentalfloss.com/article/69282/8-hard-facts-about-penis-bone
http://www.pnas.org/content/106/Supplement_1/10025.full
http://www.nytimes.com/2013/08/02/science/monogamys-boost-to-human-evolution.html
http://onlinelibrary.wiley.com/doi/10.2164/jandrol.04145/full
https://www.nature.com/articles/nrg774

Images:
https://commons.wikimedia.org/wiki/File:Pika_in_Nipesotsuyama.jpg
https://commons.wikimedia.org/wiki/File:Young_male_chimp.png
https://commons.wikimedia.org/wiki/File:Armand_de_Montlezun_(1841-1914)_Bacalum_terre-neuve.jpg
https://commons.wikimedia.org/wiki/File:Raccoonpenisbone.jpg
https://commons.wikimedia.org/wiki/File:Lab_mouse_mg_3263.jpg

Why Don’t Humans Have Penis Bones?

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