K I'm 15 and I have not started puberty yet.IM (5.7) and I have not had a growth spurt.I peed in the bed until I was 15.The doctor said I would stop when I started puberty and it sort of has.So I went to do the doctor again and he said I have not started puberty yet.And I'm concerned about this cause I'm insecure cause I want to be taller and have a bigger private.And I think its small cause its only 6inches:(does masturbation increase the size if not what does)And what's big and what's small tell me .