The Origins and Common Usage of British Swear-words

“This entry discusses the etymology and application of a selection of words that, to varying degrees, can be considered vulgar or offensive. As a necessity, this entails the use of said words, and it is strongly advised that, should you find such words distressing or inappropriate, you do not read on beyond this point.” (BBC via walker)

From that introduction, you would think the article does not flinch in the face of such words. Nevertheless, a number of those discussed are asterisked out.