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Why Men Don't Have Sensory Whiskers and Spiny Genitals
sciencehabit writes "Most male mammals wield a penis covered with spines made of keratin, the same material that forms fingernails, to sweep out competitors' sperm and irritate a female into ovulating. Even chimpanzees, our closest relatives, have penile spines. So why don't men? A new study suggests that this feature disappeared due to a chunk of DNA that went missing after our evolutionary divergence from chimps. The researchers have identified another DNA deletion that may have contributed to humans' bigger brains."
Most male mammals wield a penis covered with spines made of keratin, the same material that forms fingernails, to sweep out competitors' sperm and irritate a female into ovulating.
Human females are different. They get irritated when ovulating. Before, during and after, in fact.
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The female chooses the mutant. The two things are not separate. The mutant male had no spines, so she chose him. Her sons had no spines, so other fems chose them. Fitness at work.
That's all fine and dandy, but considering that presumably, females of other species don't want them, either, why do they still exist there?
That's something of a presumption, given the fact that condoms can still be bought "ribbed for her pleasure".
Sure I'm paranoid, but am I paranoid enough?