>>9708724Martinson, Floyd M. (1973). Infant and Child Sexuality: A Sociological Perspective. The Book Mark.
By twelve years of age, approximately one boy in every four or five has tried at least to copulate with a female and more than ten percent of preadolescent boys experience their first ejaculation in connection with heterosexual intercourse, according to Kinsey. Ramsey reported that about one-third of his sample of middle-class boys had attempted sexual intercourse.
Ford. C. S.. & Beach. F. A. (1951). Patterns of sexual behavior. New York: Harper & Row.
As long as the adult members of a society permit them to do so, immature males and females engage in practically every type of sexual behavior found in grown men and women. [p. 197] […] After reviewing the cross-species and cross-cultural evidence, we are convinced that tendencies toward sexual behavior before maturity and even before puberty are genetically determined in many primates, including human beings.
