American flirtation in which it is understood from the beginning that nothing is to happen, in contrast to a continental love affair in which both partners must always bear in mind the serious consequences. Our emotional ties, the unbearable intensity of our grief, make us disinclined to court dangers for ourselves and those belonging to us. We do not dare to contemplate a number of undertakings that are dangerous but really indispensable, such as aeroplane flights, expeditions to distant countries, and experiments with explosive substances. We are paralyzed by the thought of who is to replace the son to his mother, the husband to his wife, or the father to his children, should an accident occur. A number of other renunciations and exclusions result from this tendency to rule out death from the calcula-
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