You know, there was a time when the words "damn" or "bugger" were considered horrible profanities - my gran still gets a bit of apoplexy whenever I say bugger in conversation. So really, I think that "profanity", if there even is such a thing, evolves just as every other aspect of language does. Tekla pointed out earlier that kids today seem to have a much smaller vocabulary than older people, and to an extend I'd agree since we grew up very much more a visual generation than a vocal generation, but also, we simply grew up using different language in the same way that that they grew up using different language from what was used in the 1890's or 1920's, for example. Language is a dynamic thing that keeps evolving, and we probably have alot of vocabulary in our brains that older people don't have or won't accept, simply because they are newly invented words that older people still see as "slang". I mean, in what dictionary today are you going to find the verb to "google", and yet it's pretty-much part of our vocabulary now.
Mina.