"When a man has been the lover of a woman as that man had been hers, with the vibrating communion of a voluptuousness unbroken for two years, that woman maintains a sort of physiological, quasi-animal instinct. A gesture, the accent of a word, a sigh, a blush, a pallor, are signs for her that her intuition interprets with infallible certainty. How and why is that instinct accompanied by absolute oblivion of former caresses? It is a particular case of that insoluble and melancholy problem of the birth and death of love."