PITH is speachless.
I was raised in a household with traditional Christian values and I rarely indulge in any sort of profane language, but I have never had a problem with the cursing SK uses in his writing. People in the real world curse and SK's writing is a reflection of that. It does not change the way I speak, nor does it insult or offend me. I'm not trying to be a smart aleck or anything, but my best advice would be that if Stephen King's profanity offends you then you probably shouldn't be reading Stephen King books.
Don't read any books by Richard Laymon or Shaun Hutson, you'll explode.