If you have not yet completed puberty, then there is nothing you need to do. It will grow to its full potential all on its own, without any input from you.
If you have already completed puberty, there is nothing you can do to increase the size of your penis, other than getting surgery.
Yes, penis does affect radiation.
Your penis is pretty tough and grows at its own rate. There is not much that will hurt its growth. Also not much that improve its growth.
Of course, homones start the process of penis growth, but the final size is determined by genetics . . . you inherit penis size from your parents.
Smoking
Yes.
Maybe, but it won't stunt your growth
having afternoonstretches with your junks will help growth. INSTRUCTIONS: stretch penis to all directions for 20 seconds.
Yanking your penis will not help it grow.
No.
13
lick it,
clearly not your penis