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1. www.webmd.com › men › what-is-the-average-penis-sizeAverage Penis Size: What Determines It - WebMD

   www.webmd.com › men › what-is-the-average-penis-size

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   2022年11月10日 · This means your penis would have grown to its maximum size by the time you reached your 20s. If you are wondering what is the average penis size at this age, the answer may surprise you. Most ...