Evolution has evidently created the foreskin to further several important anatomical functions, and these have apparently been a feature of all mammals for millennia
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The foreskin protects the glans penis from friction and abrasion throughout life. It also protects the glans penis and its urethral opening from ammonia and feces during human infancy, which itself may help prevent meatal disease.
The foreskin is highly innervated and the region of most acute sensation on the penis. The foreskin has been described as “primary, erogenous tissue necessary for normal sexual function.”
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