Contemplating life (and boners) with 15 year old

Ce

So we were talking and she pointed something out to me that I've never thought about, why do we call erections "boners" if humans lack a baculum? Where the hell did that nick name come from?

If you had to guess, by all means pick a poll answer. If you actually have some a legitimate reason comment. I'm specifically not googling it yet as I might miss out on your ladies possibility entertaining wisdom.

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