From JackinWorld.com
CAN YOU MASTURBATE TOO MUCH?
For the first few months or years after they discover masturbation, almost all guys masturbate more often than they ever will in their lives. It's not uncommon for a 13- or 14-year-old to masturbate 3, 4, or even 5 or 6 times per day. (We even heard from a fellow who once managed to orgasm 22 times during a 24-hour period!) It's not surprising, then, that some guys worry they may be doing it too much. It is possible that time spent masturbating could be put to more productive use — but if you would have spent it just watching TV or something, don't worry about it. Just enjoy it and know that in a couple of years, you'll probably throttle back on your masturbatory habits somewhat.