IT shouldn't. If it does, check with a doctor or a free clinic.
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.
a penis grows downwards when the young male growsup
Masturbation will rarely cause wrinkles. You are probably going through puberty. During puberty, your penis grows. As a result, sometimes, your penis's skin grows faster than your penis itself. As a result, you get wrinkles. As you get older, the wrinkles will start to fade and/or disappear as your penis lengthens.
Yes.
yes
Probably make it hurt, but not a lot else.
If she grows a penis, yes.
until it grows a penis or a vagina
Overall penis length grows the most during puberty, commonly starting at age 8-12.
No.
No it doesn't. It just increases bloodflow in the penis.
Of course. The penis is an organ of your body, and that means it can suffer bruising; or it can get a sexually transmitted disease.