What is it exactly that makes a penis grow? -

I am not trying to grow anything on my body but i would like to know what it is exactly that make a penis grow. like what hormones and what goes on in your body that makes it grow during puberty or at any other time in life.

Testosterone

hormones produce testosterone which make things change like a penis.

Cant really say i think its just as you get older everyhting gets bigger.

It s all in your genes.