H. L. Mencken,
The American Language — Expletives and Forbidden Words
(1919)
“ When we come to words that, either intrinsically or by usage, are improper, a great many curious differences between English and American reveal themselves. The Englishman, on the whole, is more plain-spoken than the American, and such terms as bitch, mare and on foal do not commonly daunt him, largely, perhaps, because of his greater familiarity with country life; but he has a formidable index of his own, and it includes such essentially harmless words as sick, stomach, bum and bug. The English use of ill for sick I have already noticed, and the reasons for the English avoidance of bum. ”
