I imagine in my story when it's done, there will be alot of swearing. Not particularily pointless, I think it fits the tone reasonably well, but is that a problem, or should I be using fudge and sugar in future?
Providing it fits the tone of the story, there's no limit on language. Just make sure you give the story an appropriate maturity rating :)
Yeah, a 5 or a 6 I would say. It has to be rather extreme in order to reach 7 or 8.