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Rh It seems to me very remarkable that Westermarck looks upon this innate aversion to sexual intercourse with persons with whom we have shared childhood as being at the same time a psychic representative of the biological fact that inbreeding means injury to the species. Such a biological instinct would hardly go so far astray in its psychological manifestation as to affect the companions of home and hearth which in this respect are quite harmless, instead of the blood relatives which alone are injurious to procreation. And I cannot resist citing the excellent criticism which Frazer opposes to Westermarck’s assertion. Frazer finds it incomprehensible that sexual sensibility to-day is not at all opposed to sexual intercourse with companions of the hearth and home while the dread of incest, which is said to be nothing but an offshoot of this reluctance, has nowadays grown to be so overpowering. But other remarks of Frazer’s go deeper and I set them down here in unabbreviated form because they are in essential agreement with the arguments developed in my chapter on taboo.

“It is not easy to see why any deep human instinct should need reinforcement through law. There is no law commanding men to eat and drink, or forbidding them to put their hands in the fire, Men eat and drink and keep their