They teach the morals of a whore, and the manners of a dancing master.
Source: Quoted in: James Boswell, Life of Samuel Johnson, 1754 entry (1791), referring to Lord Chesterfield's Letters to His Son.
-- Samuel Johnson, (Sep 18 1709-1784), English lexicographer, critic; He was remembered for writing the first critique of Shakespeare, 1765 and Dictionary of the English Language, 1755.