“One should never make one's debut with a scandal. One should reserve that to give an interest to one's old age.”

“One should never trust a woman who tells one her real age. A woman who would tell one that would tell one anything.”

“One should always be in love. That's the reason one should never marry.”

“One should never give a woman anything she can't wear in the evening.”

“One should absorb the colour of life, but one should never remember its details. Details are always vulgar.”

“Pleasure is the only thing one should live for, nothing ages like happiness.”

“One should never do anything that one cannot talk about after dinner.”