Yanking your penis will not help it grow.
You may get one more small growth spurt, which should include your penis, but don't hold your breath.
No and it should not be done as it can damage the natural growth of the penis during puberty.
Yes, penis does affect radiation.
you might have an STD. you should go see a doctor!
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.
Andro-gel does not aid in adult penis growth, it is prescribed to address low-levels of testosterone. Hormone therapy can carry significant risks to the patient and should only be done under the direct supervision of a medical doctor.
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.
Ummm.... you just leave him alone he is probably just excited, It should go away after cooling down. If it looks to be giving him pain take him to the vet but DON'T do anything to his penis yourself.
Maybe, but it won't stunt your growth
There is no scientific evidence to support the claim that race alone determines penis size. Penis size is influenced by a combination of genetic, hormonal, and environmental factors. Variability in penis size exists within all races and should not be generalized based on race.