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"Describes variations and deviations in sexual interaction in both humans and animals. The chapter notes that instincts follow an unvarying order. The first to develop are those relating to the preservation of the individual: then appear the ones relating to the preservation of the species; and finally those relating to the preservation of various social groups. The biological intent of the sexual instinct is the preservation of the species; it develops much later than the instinct of self-preservation. It is a secondary instinct. Many of the lower animals which reproduce their kind without copulation have only individualistic instincts. Individualistic instincts are more persistent, and the instinct of reproduction only appears when individualistic instincts are fully completed. Since sexual reproduction is a condition which is indispensable for the propagation of the species, the individualistic instincts must be suppressed in a certain degree in its function. And as social instincts develop, there is bound to be an analogous effect upon the instinct of reproduction. In civilized societies the intellectual element is so preponderating in sexual unions that, according to Starcke, amongst the various ways of desecrating married life, intellectual desecration is the most serious. Still, it must be admitted that a systematization of sexual selection, exclusively based on intellectual and moral qualities, would probably result in annihilation of the species." (PsycINFO Database Record (c) 2008 APA, all rights reserved).

Sexual behavior in animals.

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Sex (Psychology). --- Sexual instinct.

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Sexual ethics --- Civilization, Medieval

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Sex --- Sexual ethics. --- Sexualité --- Morale sexuelle