Nitric oxide and penile erectile function. - Ya l penis
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There's all kinds of penises out there, you might be more normal than you think. Check out more awesome BuzzFeedBlue videos! Human penises vary in size on a number of measures, including length and circumference Swan, Shanna H; Main, Katharina M; Liu, Fan; Stewart, Sara L; Kruse, Robin L; Calafat, Antonia M; Mao, Catherine S; Redmon, J. Bruce; Ternand.