- Sep 20, 2018
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Personally, my guess is going to be because of this:Why do you think they're called "boners"?
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For anyone that is terrified of clicking the link, apparently Baculum is the technical term for a penis bone.
So, my guess is that 'way back when', someone learned about the penis bone that a lot of animals have to get an erection and then coined the term boner because of that knowledge.