THE SMART TRICK OF PORN THAT NO ONE IS DISCUSSING

I'm 15, and Once i measure my penis erect its only about 4 and 3 quarter inches extended, and afterwards all my good friends in locker rooms and stuff has Much bigger penises, And that i really feel I'm way below typical sized, and questioned if it will eventually grow any more and when theres a chance I could possibly have some kind of problem?Thi