Hello Dr. I'm a 19-year-old boy and my problem is that I have a small dick when it's erect its size is around 3.9 inches and I doubt why is why my dick is not big as other guys my age. And it's very uncomfortable and disturbing to me I often take a lot of stress thinking about this. I have a doubt I want to ask you is that once when I was around 10 or 11 years old I was alone and I pulled my foreskin back unintentionally as I remember it didn't hurt me but I guess after that incident my penis stop growing. So please tell me is this the reason my penis stopped growing or is it something else. P.S.:- and after that incident whenever I masturbate i'm able to pull my foreskin fully back without any pain or uncomfortable feeling.