I don't know if it does or not it my be a stupid question but I don't know LOL
No it doesn't. It also doesn't make it bigger. It will stil get bigger cause you are growing still. In fact Masturbation is perfectly normal and healthy.
nah if anything it would help it get bigger since using muscles is how they grow.
If it did, all males would eventually have half inch penises...
No it will not.