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The Task and the Methods
The Nature of Coitus
Types of Sexual Stimulation
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adolescence adult male Alorese apes appear attempt Azande baboons boys breasts castration cent Chagga Chapter chimpanzees climax clitoris coital coitus copulation copulatory cultural cycle dogs ejaculation engage erection erotic estrogen estrus evidence evolutionary female chimpanzees female's feminine fertile form of sexual frequently genitalia genitals girls heterosexual homosexual Hopi human females human sexual human sexual behavior human societies important individuals indulge infrahuman intromission involved Kinsey labia Lepcha less liaisons lower mammals macaque male and female male's mammals marriage masculine masturbation mateship mating mature menstruation monkeys monogamous normal observed occur orgasm ovarian hormones ovaries pattern penis period physiological Polygyny permitted Population practice pregnancy primates puberty rare rats receptive female relatively reproductive result sex play sexual activity sexual arousal sexual behavior sexual excitement sexual intercourse sexual organs sexual relations sexual responsiveness Siriono social Sororal polygyny stimulation subhuman subprimate Tikopia tion Trobrianders Trukese usually vagina vulva Wogeo woman women Yerkes young