ductape_n_roses answered Friday November 24 2006, 1:24 am: While results vary across studies, the general consensus is that the average human penis is approximately 12.7-15 cm (5-5.9 in) in length and 12.3 cm (4.85 in) in circumference when fully erect. The average penis size is slightly larger than the median size. Most of these studies were performed on subjects of primarily European descent; worldwide averages may vary.
A research project, summarizing dozens of published studies conducted by physicians of different nationalities, shows that worldwide, erect-penis size averages vary between 9.6 cm (3.7 in) and 16 cm (6.2 in). It has been suggested that this difference is caused not only by genetics, but also by environmental factors such as culture, diet, chemical/pollution exposure[1], etc.
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