Don't do it, it's not worth losing your parents' trust. You need to show them that you are mature enough for a navel piercing and going behind their backs and having a friend pierce it is about the most childish thing you can do. Also they're going to find out about it at some point, either during the summer or if it gets infected.
Just wait until you're 18 to get it, it's not that big of a deal (I got mine at 19.).
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.