To draw an analogy is offensive; one cannot compare apples and oranges fairly. This term was already so well known in Shakespeare’s time that he was able to make a pun—more accurately a malapropism—on it and be sure it would be perfectly understood (“Comparisons are odorous,” says Dogberry in Much Ado about Nothing, 3.5). The earliest reference recorded is from about 1430, and there are equivalents in French, Italian, and numerous other languages.