If masturbation made a guys penis grow, they wouldnt even fit it in their pants. Masturbaition is completely normal as I am a girl I do it frequently.
matsterbation is NOT bad for you... it is completely normal and most people do it... and it will NOT effect the growth of your penis.
I hear it takes a toll in the long run. You're less able to funcion with real women...
Masturbating will not effect the size of your penis in any way.