Penis size is genetically determined. Once you are finished with puberty there is no chemical, drug or supplement that will cause growth. There is an expensive surgery that can add some length and you can get injections of Restylene for width. If you are concerned that your penis is too small then find a smaller girl. Vagina size varies quite a bit just like penis size.
Primary Growth adds height, while secondary growth adds Girth.
Appositional growth occurs on the surface of bones and adds a series of layers to increase the diameter or thickness.
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.
glands
Maybe, but it won't stunt your growth
Smoking
Yes.
Of course, homones start the process of penis growth, but the final size is determined by genetics . . . you inherit penis size from your parents.
having afternoonstretches with your junks will help growth. INSTRUCTIONS: stretch penis to all directions for 20 seconds.
13
clearly not your penis