Galateo: The Rules of Polite Behavior (Il Galateo, overo de 'costume) by Giovanni Della Casa (1503–56) was published in Venice in 1558. A lively guide to what one should do and avoid in ordinary social life, this influential courtesy book of the Renaissance explores subjects such as dress, table manners, and conversation. It became so popular that the title, which refers to the name of one of the author’s distinguished friends, entered into the Italian language. To “not know the Galateo” means to be impolite, crude, and awkward in polite society. linkI often "forget my Galateo." Here is Galateo on puns and word play:
You will meet also with some people, who, for every word that is spoken, have some other word, without any meaning, ready at hand, by way of jingle; others, who will change the syllables of a word in a trifling, foolish manner; others will speak or answer in a different manner from what we expected; and that without any wit or beauty of thought, as,
'Where is my Lord?' -- [In his clothes, unless he is bathing or in bed].
'How does this wine taste?' -- [A little moist, I think].
'How is this dish to be eaten?' -- [With your mouth and the like].
All which kinds of wit (as you will easily apprehend) are low and vulgar. But to discourse what kinds of wit are most elegant and genteel, is no part of my present design; for this has been done already and very copiously, by men far my superiors in learning and ingenuity. Besides, as all true wit affords immediately sufficient and certain testimony of its own grace and elegance, you can very rarely err in this respect, unless you are blinded by an immoderate degree of self-partiality: For whenever a jest is really facetious and elegant, there immediately arises an appearance of mirth and laughter, joined with no common degree of admiration.___________________________
If, therefore, your witticisms are not instantly approved by the laugh of the company,* for Heaven's sake, do not attempt to be witty for the future, for you may take it for granted, the defect is in yourself, and not in your audience. For the hearers, being immediately stricken with a ready, genteel, and delicate repartee or bon mot, cannot possibly forbear laughing, though ever so desirous, but must necessarily laugh, though against their will.