As human heads grew, so did human penises

The wages for heavy brains may not be artwork , culture , comfort , or even introductory survival . rather , it may just be the development of orotund penises .

The great apes are bigger than humans in a mint of ways . A pile of them have overall sizing on us . Because they ’re not sitting around in swivel chairs all day they mostly have bigger muscles . But there are at least two parts of the human body that surpass our ape cousin-german ’ in size : heads and penises . It turn out that these two things are not unrelated .

Tiny little chimp brains can be contained in tiny little Pan troglodytes heads . And midget little chimp heads can be easily birthed . As humankind needed larger brains to acquire language , imagination , and the power to learn , their head require to expand along with everything else . In order for expectant - headed human infants to add up out of human females , the nascency canal of human females needed to expand .

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These expanded birth canals mean competition was on as to whose sperm cell could get to the final stage of it in Holy Order to do some impregnating . There are only a few way to do this . Either super - charge sperm can race down the nascence epithelial duct or unconstipated sperm can be given a ‘ heading start ’ . The larger heads of infants lead to larger birth canals , which in turning conduce human males to have much bigger penis than the great apes .

Just do n’t severalize that to a silverback gorilla .

ViaDiscoveryandScientific American .

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