Human penises vary in size on a number of measures, including length and circumference . In humans, the AR gene located on the X chromosome at Xq12 which may determine the penis size. The SRY gene located on the Y chromosome.
Penis size is determined by hormone exposure and varies greatly from one individual to the next. The average length of a.
Penis size is determined by a variety of factors — the biggest being human genetics, which can produce incredibly varied, sometimes curious.
Pop culture is captivated by big dicks, but we're often misinformed about the science behind them. Here's what determines penis size.