I don't know for a fact, but I suspect that people have been cussing almost since they invented language. However, societal expectations have been up and down over the centuries. To those of us watching television and movies today, it might seem as if things have never been so bad, but there have been times and places when cussing was far more common than today, just as there have been times and places when it was not so accepted. I haven't looked it up, but I suspect that "cussing" is a derivative of "cursing," and the practice has been looked down upon largely due to biblical prohibitions on cursing and on taking the Lord's name in vain. Cursing, of course, has meanings other than that of vulgar language. I cannot say that I do not cuss, although I'd like to reach a point in my life where I could stop the practice altogether, if only because it offends other people. Still, when I hit my finger with a hammer, or when my chainsaw blade gets jammed in a tree, the words that come out of my mouth are often not ones that I am proud of. I do a little better (maybe a lot better) when it comes to taking the Lord's name in vain, but I can't say that I have entirely been able to take control of that one either, although I've come much closer. That, I think, is the far more important one to take control of because that is an offense, not only to the people around you, but to God. And I don't think the Bible is talking about using the F-word when it warns us not to take the Lord's name in vain. Please excuse me for bringing religion in a discussion about language, but I do believe that the origins of our disdain for some of these words is rooted in religion. Not entirely, however, for people will tend to look down upon those who use vulgar language simply because it's vulgar, and because it might suggest that the person who uses these words often doesn't have any other ones.