Sex dating in williamson iowa

In some African and Micronesian cultures, young men have one of their testicles crushed.

Male genital mutilation makes it less likely that a male will manage to father a child with another mans wife, Wilson says.

Younger men, he says, willingly submit to having their reproductive ability reduced because they benefit socially from the older men, by forming alliances, and by gaining access to weapons or tribal lore.

When most uncircumcised males achieve an erection it pulls the foreskin back over the glans and back down the shaft of the penis, enabling the coronal ridge to do its business and scoop rival males semen away from the womans cervix. The idea could be tested by comparing the incidence of non-paternity between circumcised and intact males.

Genital mutilation, in this view, is just another way to win the sperm war.

In some forms of mutilation, the handicap to sperm competition is obvious.

So why do some societies insist on such a risky ritual for their men?

There may be an evolutionary explanation, according to Christopher Wilson, of Cornell University in New York, US.

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READERS: The latex genitalia study wasn't terribly convincing because the models were circumcised, and in real life the foreskin would interfere with the semen-displacing functions of the coronal ridge.

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