I'm 16 years old and nervous about my development progress. I show some signs of puberty, the main one being a large penis, at just over 8" long when erect. However, I have little armpit hair, little facial hair, small testicles, a voice that is not very deep at all, and my pubic hair only grows in a small area. Is it possible that I am just going to be a late bloomer? Or is there another probable cause?