"Most women...have a nest-building instinct connected with love: they want a habitation of their own, with their own furniture, their own linen cupboard, and their own husband and children. Most men, conversely, are more contented when they have a wife and children for whom they provide. The whole pattern is primitive: the cave man hunted, the cave woman stayed in the cave and cooked what her husband brought from the chase. In the fulfilment of such ancient needs there is a profound satisfaction which cannot be obtained by a continual series of unimportant pleasures."