Now for the magic of science:
http://en.wikipedia.org/wiki/Human_penis_size
"While results vary across studies, the consensus is that the mean human penis is approximately 12.9–15 cm (5.1–5.9 in) in length with a 95% confidence interval of (10.7 cm, 19.1 cm) (or, equivalently, 4.23 in, 7.53 in).[6][7][8] The typical girth or circumference is approximately 12.3 cm (4.85 in) when fully erect. The mean penis size is slightly greater than the median size."
19 out of 20 penises are between 4.23 in 7.53 inches
1 in 40 are less than 4.23 inches
1 in 40 are greater than 7.53 inches
Apparently there is a pretty solid normal distribution with a tight standard deviation. That mean that and unenhanced 9 inches erect should be pretty freakishly rare. (You'd have to get a full inch and a half over the top end of the normal range.)
http://en.wikipedia.org/wiki/Human_penis_size
"While results vary across studies, the consensus is that the mean human penis is approximately 12.9–15 cm (5.1–5.9 in) in length with a 95% confidence interval of (10.7 cm, 19.1 cm) (or, equivalently, 4.23 in, 7.53 in).[6][7][8] The typical girth or circumference is approximately 12.3 cm (4.85 in) when fully erect. The mean penis size is slightly greater than the median size."
19 out of 20 penises are between 4.23 in 7.53 inches
1 in 40 are less than 4.23 inches
1 in 40 are greater than 7.53 inches
Apparently there is a pretty solid normal distribution with a tight standard deviation. That mean that and unenhanced 9 inches erect should be pretty freakishly rare. (You'd have to get a full inch and a half over the top end of the normal range.)