The Scientific Case for Masturbation

Sharon Begley in Newsweek:

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.

The science is straightforward. Whenever a behavior is common in the animal kingdom, biologists suspect it has an adaptive function. That is, the behavior enabled individual animals to survive better and leave more offspring than animals that did not engage in the behavior. As a result, genes for the behavior spread throughout that population until it became essentially ubiquitous. And so it is with autoeroticism, which is common—really common. As the Science in Seconds blog noted this week, what with “spanking the monkey,” “charming the snake,” and “freeing willy,” a remarkable number of the slang terms for pleasuring oneself refer to animals. That reflects reality: the practice has been documented in Japanese macaques, gibbons, baboons, chimps, elephants, dogs, cats, horses, lions, donkeys, “and walruses that manage to flog the bishop with their fins.” (Bonus for clicking on the blog link above: excellent photo of an elephant in flagrante dilecto.)

What, then, might be its adaptive function?

More here.