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Male mice develop a thicker penis if they grow up around other males, a study has revealed. The exact reason is not known, but it is thought that competition for sex drives the difference in penis shape compared to mice that grow up in female-only environments, according to scientists at the University of Western Australia. A thicker penis likely results in "higher genital stimulation on the female," said Goncalo Andre, co-author of a study published this week in the journal Proceedings of the Royal Society. Unlike humans, male mice have what is called an "ossified" penis, which means it sports a bone.
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Mice vying for females have 'thicker' penises: study

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Mice vying for females have 'thicker' penises: study

While there have been numerous prior studies both scholarly and unscientific on penis size, the British Journal of Urology International BJUI published one of the girthiest analyses to date. Pulling data from 17 previous academic papers that included a total of 15, men worldwide, researchers in the UK came up with a meta-analysis of what they believe to be the average penis size and girth of a penis when erect and when flaccid. Sorry, guys, but your eggplant emoji isn't exactly accurate. According to the new research in BJUI, the average flaccid penis is 3. Girth is 3. Numbers aren't the only results to come out of the new study. It also questions some of the common penis size stereotypes, like whether your race or foot size are determining factors for penis size.
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How big is the average penis? Let's compare with household objects.

Don't measure it! That is a disgusting practice. Women are very bored by men who talk about size and think that a guy is really weird if he measures himself. Get a life outside your crotch.
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