Science goes to great lengths to measure average penis size - Los Angeles Times
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Jon Rees on Twitter: "10,700 men in study of normal penis size @BJUIjournal - 9.2cm flaccid, 13.1cm erect http://t.co/S20hvXhoAW http://t.co/KZzKRlAIwL" / Twitter
File:Example of Size Variance of Single Human Penis with Average Erect Length.gif - Wikipedia
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