No. You don't let your child do that and especially not at 13. Time to set boundaries. This is very inappropriate.
NO!
yeah deffinatly
NO.
A normal 24 year old would have a penis of between 5 and 7 inches long.
A 5" penis is perfectly normal.
7 incheserect
That's tiny
Shes weird if she was normal she would touch your penis in the FRONT of your pants
around 10 inches is about the norm for a 26 year old.
No that is not normal actually that's something that needs to get checked out. The parent should be alarmed/notified about that, because maybe the child needs someone to talk to or help from someone.
Depends on whether your penis is erect or flacid. Also, if you are Chinese I wouldn't worry - you're ahead of them in terms of penis size.
yes if its before puberty then yes