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Stories about: promiscous

A Woman's Promiscuity Determines the Sperm's Speed and Power Humans, like animals, experience a fierce competition for sex. And this competition does not stop with mating, as a woman can be promiscuous. That's how sperm competition emerges. A new research has tried to see how sperm speed connects to the species' sexual behavior, while placing us amongst other primate... 25 July 2007 14:36 GMT