The scientific case for masturbation

by SHARON BEGLEY

Science in Seconds

Since Christine “I’m Not a Witch” O’Donnell is campaigning for the U.S. Senate and not the directorship of the Kinsey Institute, maybe we should give her a pass when it comes to her views on sex and, specifically, masturbation. But that would be a mistake: the stakes are simply too high, going all the way up the very survival of our species. For while O’Donnell crusaded against masturbation in the mid-1990s, denouncing it as “toying” with the organs of procreation and generally undermining baby making, the facts are to the contrary. Evidence from elephants to rodents to humans shows that masturbating is—counterintuitively—an excellent way to make healthy babies, and lots of them. No one who believes in the “family” part of family values can let her claims stand.

1. Masturbation might remove old, worn-out, broken sperm from the reproductive tract. That would increase the fraction of healthy, speedy sperm, improving a male’s chance of becoming a father. “In humans, masturbation increases sperm quality (by promoting younger sperm) without affecting sperm numbers in the female reproductive tract,” notes biologist Jane Waterman of the University of Central Florida in a new paper in the journal PLoS One. As far back as 1993, biologists had observed that masturbating decreased the number of sperm a man delivered the next time he had sex with his partner, but not the number of sperm the woman retained. They concluded that “masturbation is a male strategy to increase sperm fitness.”

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