Hi, I am a 16 years old boy. My skin is still attached with my gland head. It doesn't move behind the grand when my penis is erected or when I masturbate(thought i started masturbate resently ) . When i pull it back in normal condition its come back opening the head but due to the skin attached to it , it doesn't go back. It don't pain too much in my tries to pull it back . So friends, does i need to have a operation ?