Most guys have serious concerns about their penis size. Here is the current reality on that subject:
A 2014 study of 1,661 sexually active men determined that the average erect penis size is about 5.57 inches long and 4.81 inches around. Only 2% of the respondents had more than 8 inches of length.
The penis is correctly measured along the top while fully erect, from the tip to where it joins the body.
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Some useful internal links:
Understanding how our body works helps us to achieve higher levels of pleasure from our sexual experiences.