A pun does not commonly justify a blow in return. But if a blow were given for such cause, and death ensued, the jury would be judges both of the facts and of the pun, and might, if the latter were of an aggravated character, return a verdict of justifiable homicide. – Oliver Wendell Holmes, Sr. (1809–1894), The Autocrat of the Breakfast-tabl

People who make puns are like wanton boys that put coppers on the railroad tracks. They amuse themselves and other children, but their little trick may upset a freight train of conversation for the sake of a battered witticism. – Oliver Wendell Holmes, Sr., The Autocrat of the Breakfast-Table, 1858