Don't make love to another woman before her face, even if she be your wife. Don't do it. Always be polite, even should she fancy somebody better than you. If your mother, my dear Amadis, had not fancied your father better than somebody, you might have been that somebody's son. Always be a philosopher, even about women.
Few men understand women.
Frenchmen, perhaps, better than any one else. I am a Frenchman.