" A man who marries a woman inferior to himself i.e. 'adopts' her must expect that she cannot feel anything for him but liking and gratitude. A woman is better off than a child, after all; if necessary, she can take care of herself, like any man. That she nevertheless allows her husband to pay all the bills is a personal concession that can be retracted at any time. She is entitled, therefore, to high expectations: everything done for her must be first-rate, otherwise she may engage another protector or else, depending upon circumstances, even decide to take care of herself. Compared with the real father, a wife's 'adopted father' has no hope of becoming his pseudo-child's protege in his old age, either. The most he can hope for is the status of an inadequate or pseudo-protege i.e. if he is lucky, he may come to enjoy the woman's altruistic love, her charity.
The woman even gets a reward: she inherits his property, his insurance, his pension rights, so that he can go on providing for her after his death, the death she is statistically prepared to survive for, on the average, six years, plus the number of years she is younger than he is. "

― Esther Vilar , The Polygamous Sex