yes a boy will grow hair
A boy knows that he's going into puberty once the hair around his private part starts to grow.
During puberty, hair will grow around the anus and on the buttocks themselves, along with growing on the testicles, base of the penis and around it.
of course once a boy starts to go through puberty the will grow hair on their balls THATS STUPID YES BOYS HAVE HAIR ON THERE BALLS ITS CALLED PUBIC HAIR AKA PUBS
One type of puberty is when a girl grows hair in personal places and the second one is when a boy starts to grow underarm hair and the third one is when the start to change their behavior
You will grow pubic and underarm hair when you start Puberty. If you are young, be patient, and wait for them to grow. It is a part of the process from boy to man. It will happen on it's own accord.
Generally, no unless he has hit puberty. It is the hormones that allow boys/men to have facial hair.
There is no set time. It depends on the hair colouring: dark hair showing easier than blond, and the age the child passes through puberty.
Yes, hair growth is normal for a boy going through puberty. However, at 13, I very much doubt you're at the end of puberty. Most males end puberty at around 16 or 17.
They can have hair near the penis, armpits, facial, and the chest.
There is no particular stage of puberty that you shouldbe at. Puberty is a very variable process and different boys can start it at different ages. They can also go through the various stages of puberty in different orders. For example some boys will get hair growing in the armpits before they grow any pubic hair near their penis while other boys will grow pubic hair before they grow hair in their armpits. The average age at which puberty usually starts in boys is 12 to 13 years of age but the normal range for puberty to begin is anywhere between 9 years of age and the late teens. Which ever stage of puberty you are in at 12 years of age is the right stage for you.
Like most things to do with puberty it varies from boy to boy. There are several different processes which happen during puberty and they don't always happen in the same order. Some boys grow armpit hair before they grow pubic hair and with others it is the opposite way around. Boys also start puberty at different ages, any ages from 9 years of age right up until the late teens is considered to be the normal range. On average though most boys start puberty around 12 or 13. If you do already have some pubic hair then you'll probably start getting armpit hair fairly soon.
when he hits puberty