When there's no blood left in the rest of your body and it's all in there.
And if you're question is serious and sinsere:
What I found on the net was:
Increase of penis size (first in girth, then in length): 11-14,5 years (normally 1 year after the testicles have increased in size, with most guys the penis will not become much longer after they turned 16).
Of course it depends at which age you hit puberty.
And if you're question is serious and sinsere:
What I found on the net was:
Increase of penis size (first in girth, then in length): 11-14,5 years (normally 1 year after the testicles have increased in size, with most guys the penis will not become much longer after they turned 16).
Of course it depends at which age you hit puberty.