Why is it so easy to believe that a mother’s love isn’t a zero-sum proposition, but that sexual love is a finite resource? Evolutionary biologist Richard Dawkins asks the pertinent question with characteristic elegance: “Is it so very obvious that you can’t love more than one person? We seem to manage it with parental love (parents are reproached if they don’t at least pretend to love all their children equally), love of books, of food, of wine (love of Château Margaux does not preclude love of a fine Hock, and we don’t feel unfaithful to the red when we dally with the white), love of composers, poets, holiday beaches, friends …
why is erotic love the one exception that everybody instantly acknowledges without even thinking about it?”14