Quote:
Originally Posted by fatfoo
I wonder why "balls" is used as a word to mean courage or fearlessness.
I mean, if a man's balls are removed - would he still be as brave / courageous, etc?
Does the testicle organ have something to do with how the human brain behaves?
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Yes.
Testosterone is made mostly in the testicles. Other glands do secrete minuscule amounts, but a man's balls account for the majority of the "courage" hormone.