I have a grey thing half an inch line on the shaft just below the head of penis it's in like a hole thing it's starting to scare me I've never had sex and I'm 13 plz help
Hey there I think what you are describing is your fenulum. It attaches your fire skin to the underside of the glans ( head ) of your penis. You see it when you pull your foreskin back. Look up pictures and tell me if that looks like what you have thanks