JOURNAL OF ANIMAL BEHAVIOR 



Vol. 4 SEPTEMBER-OCTOBER, 1914 No. 5 



A STUDY OF SEXUAL TENDENCIES IN MONKEYS 



AND BABOONS 



G. V. HAMILTON 



Montecito, California 



In spite of the considerable advance that has been made in 

 our knowledge of sexual life since the appearance of Freud's (1) 

 Drei Abhandlungen zur Sexualiheorie, we still lack that knowledge 

 of infra-human sexual life without which we may scarcely hope 

 to arrive at adequately comprehensive conceptions of abnormal 

 human sexual behavior. For example, the possibility that the 

 types of sexual behavior to which the term " perverted " is 

 usually applied may be of normal manifestation and biologically 

 appropriate somewhere in the phyletic scale has not been suffi- 

 ciently explored. Homosexual tendencies come to frequent 

 expression in adolescent boys and girls, thereby presenting to 

 the mental hygienist a problem, the solution of which awaits, 

 first of all, biological knowledge of homosexuality which only the 

 behaviorist can supply. It is unnecessary to multiply examples 

 in illustration of the fact that both the theoretical interests of 

 the science of behavior and the practical needs of what we may 

 regard as a group of applied sciences of human behavior (viz., 

 mental hygiene, criminology, psychopathology) place upon the 

 animal behaviorist an obligation to lay the necessary foundations 

 for a scientific and thoroughly comprehensive investigation of 

 sexual life. 



The above considerations, of which I have been almost daily 

 reminded by clinical contacts with human sexual problems, have 

 led me to formulate the following problems in animal behavior: 



(1) Are there any types of infra-human primate behavior 



