![]() ![]() The GLP aggregated and excerpted this blog/article to reflect the diversity of news, opinion, and analysis. In primates, this lack of penis complexity is usually found in monogamous species. The human penis is in fact extremely dull – it does not have lumps, ridges, flanges, kinks or any other exciting feature that other primates have. Their testes, therefore, are relatively small. Male gorilla are also much larger than females, but they have a…harem-style mating system…With little or no competition actually inside the uterus, gorillas have had no need for a testicular arms race to facilitate the production of more and more sperm. For this reason, chimpanzees have evolved huge testicles in order to produce massive amounts of sperm, multiple times a day. Male chimpanzees…have a multi-male to multi-female mating system…A female therefore may contain sperm from multiple partners at any one time, which puts the sperm itself…into direct competition. testicles are rather small…The relative size of our penis and testes is all down to our mating strategies, and can provide some surprising insights into early human culture. Is the Genetic Literacy Project a corporate ‘front’? GLP responds to ongoing false allegations from US Right to Know / Organic Consumers Association / SourceWatch / Baum Hedlund / Church of Scientology.GLP Integrity Policies: Privacy, Conflicts of Interest, Verification, Fact-Checking Standards and Corrections.Mission, Financial Transparency and Governance.In other words, guys may have women to thank for their greater-than-gorilla-sized genitals.įollow Stephanie Pappas on Twitter and Google+. Men with larger penises, then, may have passed on their genes more readily, resulting in the large-genitals trait being handed down the generations. Human males weigh about half of what gorillas do, but studies peg average erect or flaccid-but-stretched penis length from 4.7 inches (12 cm) to 6.5 inches (16.7 cm).Įvolutionary biologists theorize that large human penises might help remove sperm from competing males during sex, but in an era before clothing, women may have been drawn to mating with men whose genitalia caught their eye. The tiny 3mm (0.11 inch) creature also practices one of the animal kingdom's most dangerous copulation methods: Its spiny penis is razor-sharp, and instead of inseminating females by traditional. Male humans outgun any other primate species: For example, male gorillas can weigh as much as 400 pounds (180 kilograms), but their erect penis length is only about 1.5 inches (4 cm). The findings might help explain why humans have remarkably large genitalia given their average body size, the researchers wrote. Women with greater body mass per height were slightly more likely than thinner women to weigh penis size more heavily in their judgments of attractiveness, though the difference was small. Women's own features mattered as well, the researchers found: Taller women were more likely to find taller men attractive. It's possible that a larger penis just looked more proportional on a taller man's body, the researchers wrote, or it could be that women were biased against shorter men to the extent that even large genitals didn't help. When the researchers controlled for shoulder-to-hip ratio, they found that a larger penis had a greater effect on attractiveness for taller men. ![]() ![]() That's good news for guys, according to a 2001 Italian study that found 2.99 inches flaccid to be below average. Beyond 2.99 inches, however, the additional attractiveness per extra length started to decline. Though the effect was less extreme, women also preferred larger penises, at least up to 5.1 inches (13 cm) flaccid, which was the largest computer-generated penis in the study. Shoulder-to-hip ratio was a major determiner of attractiveness, accounting for 79.6 percent of the variation in hot-or-not ratings. The results revealed that women preferred taller men as well as high shoulder-to-hip ratios (meaning that the wider the shoulders were than the hip, the more attractive the man). ![]()
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