Scientist reveals the surprising reason why human penises are so big

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Scientist reveals the surprising reason why human penises are so big

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If you're ever unsatisfied with the size of your penis, it may be comforting to know that it's pretty big – that is, relatively speaking. According to biologists, the average human male actually has a large phallus, at least in comparison with some of our closest living relatives. While the average human manhood measures 5.1 inch (13cm) when erect, the chimp and the bonobo only boast a 3.1 inch (8cm) shaft.
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