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Our knowledge of human history is spotty, at best. It’s hard to assemble a continuous timeline of our evolution, especially from periods before we learned to write things down. But it’s getting better. Each year, Listserve add a few more pieces to the puzzle.
A joint study by several Australian biologists and zoologists concluded something that most of us already suspected—penis size really does matter to women. The study published in Proceedings of the National Academy of Sciences asserted that women generally found men with larger penises more attractive, but overall attractiveness increased based on a combination of factors such as height and body type, and no individual trait determined male attractiveness.
More interestingly, the study also made several observations regarding the reason why human penises evolved to be “larger than necessary.” This might be a consequence of prehistoric women using penis size as criteria for sexual selection.
Evolutionary biologists claim this was possible due to genitalia’s conspicuity. Primitive humans had an upright posture and protruding genitals that made the penis quite obvious, even when flaccid. Females regularly choosing endowed males for mating would have led to an increase in penis size over the course of human history.
Rea More: http://listverse.com/2016/12/15/10-recent-discoveries-regarding-prehistoric-man/
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