The Book of Household Management by Mrs. Beeton

37. WHEN DINNER IS FINISHED, THE DESSERT is placed on the table,

accompanied with finger-glasses. It is the custom of some gentlemen to wet a corner of the napkin; but the hostess, whose behaviour will set the tone to all the ladies present, will merely wet the tips of her fingers, which will serve all the purposes required. The French and other continentals have a habit of gargling the mouth; but it is a custom which no English gentlewoman should, in the slightest degree, imitate.