We have here reached the grossest and most frequent perversion in this group; bestiality, or the impulse to attain sexual gratification by intercourse, or other close contact, with animals. In seeking to comprehend this perversion it is necessary to divest ourselves of the attitude toward animals which is the inevitable outcome of refined civilization and urban life. Most sexual perversions, if not in large measure the actual outcome of civilized life, easily adjust themselves to it. Bestiality (except in one form to be noted later) is, on the other hand, the sexual perversion of dull, insensitive and unfastidious persons. It flourishes among primitive peoples and among peasants. It is the vice of the clodhopper, unattractive to women or inapt to court them.
Three conditions have favored the extreme prevalence of bestiality: (1) primitive conceptions of life which built up no great barrier between man and the other animals; (2) the extreme familiarity which necessarily exists between the peasant and his beasts, often combined with separation from women; (3) various folk-lore beliefs such as the efficacy of intercourse with animals as a cure for venereal disease, etc.[43]
The beliefs and customs of primitive peoples, as well as their mythology and legends, bring before us a community of man and animals altogether unlike anything we know in civilization. Men may become animals and animals may become men; animals and men may communicate with each other and live on terms of equality; animals may be the ancestors of human tribes; the sacred totems of savages are most usually animals. There is no shame or degradation in the notion of a sexual relationship between men and animals, because in primitive conceptions animals are not inferior beings separated from man by a great gulf. They are much more like men in disguise, and in some respects possess powers which make them superior to men. This is recognized in those plays, festivals, and religious dances, so common among primitive peoples, in which animal disguises are worn.[44] When men admire and emulate the qualities of animals and are proud to believe that they descend from them, it is not surprising that they should sometimes see nothing derogatory in sexual intercourse with them.[45]