Im 17 and my penis have not grown since i was 8 im not a late bloomer and i masterbate excessively if i stop will it grow?

Masturbation & size?: Masturbation has absolutely no effect on penis size. There is no reason to reduce the frequency of masturbation. Penises come in many different sizes. There is no one "right" size. If your penis truly has not grown since you were 8years old, schedule an appointment with your pcp or pediatrician, who may refer you to a urologist or endocrinologist. These docs can make sure ur medically healthy.