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wikify Christopher J. Cold
Over the last 65 million years, the prepuce has offered reproductive advantages. Although advocates of mass circumcision hypothesize that the prepuce represents a design flaw, it is more likely that sexual selection has refined the external genitalia of each primate species for reproductive excellence.<ref name="cold-mcgrath">{{REFbook
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|first=ChristopherJ. |author-link=Christopher J. Cold
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