Jst slow down when you feel that you r gonna reach orgasm/'it' is gonna come out. And you can hold the 'neck' of your pen1s, somewhat tight, which will slow down your ejaculation.
I too am 15 and it takes me usually around 5 or 6 minutes depending on how long I have masturbated for. (5 or 6 being daily).
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.