Is it good to masterbate at 15 years of age?

Usually no problem: A person usually has no problems from masturbating (if done gently and done in an appropriate location) because masturbation has similar effects on one's body as having sex with another person (which is a biologically normal activity for all humans and animals). As always in life, do everything in moderation.

NORMAL: Masturbation is a normal part of human exiatance.Some cultures frown on the process ; most seldom discuss it openly. If anyone does so to the exclusion of interacting with people ; pursuing age ; peer related activities, it can interfere with normal emotional growth, as any preoccupation might. For most, it is simply part of their life.