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We seem to be abandoning the codes that told previous generations who they should love. But now that many of us are free to choose whoever we want, nothing is less certain. The proliferation of divorces and separations reveal a dynamic we would rather not see: others sometimes reject us as passionately as we are attracted to them. Our desire makes us sick. The throes of rivalry are at the heart of our attraction to one another. This is the central thesis of Jean-Michel Oughourlian''s The Genesis of Desire, where the war of the sexes is finally given a scientific explanation. The disco