Whether or not you masturbate (wank) is totally up to you... 

Masturbating is when boys and men rub themselves to get an erection and to have an orgasm.  While younger boys can get erections by rubbing themselves, they can’t ejaculate (come) until they are sexually mature.  Masturbating doesn’t do you any harm at all and you can do it as often (or not) as you want – just make sure that you are in a safe, private area first.  Everyone has fantasies while they masturbate and they can be about anything at all. 

Wet Dreams are when you wake up finding that you have ‘come’ while you’ve been asleep.  This is quite normal and most young men will find that this will happen to them at some time.