No, Men all have armpit hair past puberty, it is normal, I can't imagine there being a problem.
usually from ages 11 to 16 in boys and ages 10 to 14 in girls
No.
you have to hit puberty
Yes you can make your hair in ypour armpits to grow, you must shave it then it will grow back.
sweat
why would u even want to grow armpit hair it is disgusting so dont do it
to be honest mines grow about 1 metre long
It will grow naturally, once you are old enough and reach puberty.
on your head, armpit area, private parts
um obviously...
proper shaving