Penis size on dating sites
Human penises vary in size on a number of measures, including length and circumference when flaccid and erect.
Besides the natural variability of human penises in general, there are factors that lead to minor variations in a particular male, such as the level of arousal, time of day, room temperature, and frequency of sexual activity.
In a study of penis size where measurements were taken in a laboratory setting, the average penis circumference when erect was 11.66 cm (4.59 inches).
Stretched length has correlated with erect length in some cases.In humans, the AR gene located on the X chromosome at Xq11-12 which may determine the penis size.