University of Virginia Library

A STUDY OF SEXUAL TENDENCIES IN MONKEYS AND BABOONS. By G. V. Hamilton. Journal of Animal Behavior, September-October, 1914, vol. 4, No. 5, pp. 295-318.

The writer asserts that the work and problems in sexuality in human beings place upon the animal behaviorist an obligation to lay the necessary foundations for a scientific and thoroughly comprehensive investigation of sexual life. This has led him to formulate the following two problems in animal behavior: (1) Are there any types of infra-human primate behavior which cannot be regarded as expressions of a tendency to seek sexual satisfaction, but which have the essential objective characteristics of sexual activity? (2) Do such sexual reaction-types as homosexual intercourse, efforts to copulate with non-primate animals and masturbation normally occur among any of the primates, and if so, what is their biological significance?

The author presents a list of the subjects (monkeys and baboons) employed in his study; gives a description of the environmental conditions in his laboratory which is in the midst of a live oak woods In Montecito, California, about five miles from Santa Barbara; gives a list of the types of situations that were arranged

by the observer or encountered by the subjects in consequence of their spontaneous activities, and under each description of a typical situation one or more detailed descriptions of typical responses thereto; and finally offers the classification of sexual tendencies as expressions of reactive tendencies observed.

The author then enters into a discussion of the use of the term reactive tendency, and explains that this term, according to his definition, is meant to explain something more specific than an inclination to direct activity toward one of a limited number of general ends, and to include both the innate and the acquired features of an individual's reactive mechanism.

He then presents his conclusions which I shall here include in full and verbatim, because of the fact that these findings should prove of great importance, especially in the light of Freud's theories of infantile sexuality. The author states that "At least two, and possibly three, different kinds of hunger, or needs of individual satisfaction, normally impel the macaque toward the manifestation of sexual behavior, viz., hunger for sexual satisfaction, hunger for escape from danger and, possibly, hunger for access to an enemy.

"Homosexual behavior is normally an expression of tendencies which come to expression even when opportunities for heterosexual intercourse are present. Sexually immature male monkeys appear to be normally impelled toward homosexual behavior by sexual hunger. The fact that homosexual tendencies come to less frequent expression in the mature than in the immature male suggests the possibility that in their native habitat these animals may wholly abandon homosexual behavior (except as a defensive measure), on arriving at sexual maturity.

"Homosexual behavior is of relatively frequent occurrence in the female when she is threatened by another female, but it is rarely manifested in response to sexual hunger.

"Masturbation does not seem to occur under normal conditions.

"The macaque of both sexes is apt to display sexual excitement in the presence of friendly or harmless non-primates.

"It is possible that the homosexual behavior of young males is of the same biological significance as their mock combats. It is clearly of value as a defensive measure in both sexes. Homosexual alliances between mature and immature males may possess a

defensive value for immature males, since it insures the assistance of an adult defender in the event of an attack."

MEYER SOLOMON.