5 inches (which is about 13 centimeters) is the average size penis on humans.
You don't have to do anything. It's perfectly normal, the thing is, you just have to use it properly.
hahaha nothing to worry about, just consider yourself a lucky man!
A normal 24 year old would have a penis of between 5 and 7 inches long.
If you are 13, the normal length of your penis should be between 4 and 5 inches.
it depends on how big you are, but your penis will definitely be much larger than his.
It is normal, especially if you haven't gone through puberty yet or are just at the beginning of puberty.
This sounds like a penis-knuckle to me.
yes you should
no its not normal dats monster mode der
13-year-old girls shouldn't be anywhere near a penis - That would be illegal !
My friend, you have nothing to be worried about. A 'normal' adult penis is between 4.5 and 6.5 inches (11.5 to 16.5cm). However, most guys' penises don't stop growing until they are 18, so you have quite a bit to go!
Yes it is normal, depending on your age also. My guess is you are around 13 or 14-years-old. It is nothing to worry about as it will grow as you do until around 19 to 20-years-old. See the related question below.