Why Human Males Don’t Have A Penis Bone

A new study explains why human males have no penis bone, unlike monkeys, chimpanzees, and bears. The study, called “Postcopulatory sexual selection influences baculum evolution in primates and carnivores,” found that human males have no bone in their man bone because they only last a few minutes! (As opposed to animals who copulate for hours because they don’t have to go to the office.)

Primates who mate for three minutes or more tend to have far longer penis bones than those whose vaginal penetration is below three minutes,” says Matilda Brindle, who led the study at the Dept of Anthropology, University of London.

“Longer “baculum” or penis bones were also seen in species with seasonal breeding and polygamous mating systems,” says the study. “Both polygamous and seasonal breeding systems predict significantly longer bacula in primates. These results suggest the baculum plays an important role in facilitating reproductive strategies in populations with high levels of postcopulatory sexual selection.”

In other words, those polyamorous monkeys who all mate with each other grow a harder boner! Who knew?

“While polygamous mating does take place among humans, it’s not common enough to necessitate the retention of the penis bone,” says Brindle. “Primates who mate for three minutes or more tend to have far longer penis bones than those whose vaginal penetration, is below three minutes.”

Photo: Christina Appelgate notices Will Ferrell’s man bone in Anchorman.

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Anka Radakovich is a legendary Sex Columnist, Certified Sexologist, Sex Educator, Screenwriter, and Author of the book THE WILD GIRLS CLUB, PART 2, Tales from New York to Hollywood. THE WILD GIRLS CLUB, Part 2 is her third book. Her first two books, The Wild Girls Club; Tales from below the Belt, and Sexplorations; Journeys to the Erogenous Frontier were both published by Crown/Random House. She was the Sex Columnist for DETAILS Magazine for 9 years and currently writes columns for Brides.com and Los Angeles Magazine. Her writing has appeared in dozens of magazines including Marie Claire, Women’s Health, Men’s Health, Harper’s Bazaar, Cosmopolitan, Redbook, Men's Journal, Seventeen, Glamour, and Maxim. She has appeared on numerous television shows including 8 appearances with Conan O’Brien. She was a Jeopardy question under the category “Men’s Mags.” As a Sex Educator and Sexologist, she is a college lecturer at Universities throughout the country who offers her unique brand of sex education. Follow her on Twitter @ankarad.


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