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  A male executive's romantically motivated favoritism toward a female subordinate is not sex discrimination even when it disadvantages a male competitor of the woman. Such favoritism is not based on a belief that women are better workers, or otherwise deserve to be treated better, than men; indeed, it is entirely consistent with the opposite opinion. The effect on the composition of the workplace is likely to be nil, especially since the disadvantaged competitor is as likely to be another woman as a man--were Preston a woman, Trojak would still have fired her to make way for Hamilton unless Trojak was romantically entangled ...