How much is too much for masterbation?

And if you masterbate too much what can happen?How much is too much for masterbation?
Too much is when it gets in the way of you interacting with others sexually, but I can never see that happening can you?
your body chemical can be messed up and you get addicted to it
http://www.steadyhealth.com/can_masterba...
read about it
Didn't figure out that one yet.
Still doing it a lot to where my arms are to sore.=)
it will go numb
too much would probably be when your in a bus or subway and all you fell like doing, on top of your head is masterbation.