An American, an Englishman and a Frenchman were discussing the
meaning of savoir-faire.
"Well," said the American, "if you come home and found your wife
in bed with your best friend, and you quietly sneaked out without
them seeing you, that is savoir-faire."
"Not quite, chaps," said the Englishman, "if you came home and
found your wife in bed with your best friend and you said, 'Don't
let me disturb you. Please carry on,' that would be savoir-faire."
"Mais non," said the Frenchman, "if you came home and found your
wife in bed with your best friend and you said, 'Don't let me
disturb you. Please carry on.' and your best friend was able to
continue, he's got savoir-faire."