Masturbation in chimpanzees

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Archives of Sexual Behavior. Functional relationships between the penis, vagina, and cervix during copulation in the chimpanzee were studied. In 11 adult males, penile length during full erection ranged from

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In the hopes of shedding a bit more light on the interpretation of masturbation rates, here's a table comparing solo masturbation rates across animal species. Frequencies attempt to estimate or bound the median rate across individuals, or bound the individual rates. The table is meant to be sorted by rate.

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Public domain image via Wikimedia Commons. June 30, Their bodies are twisted and sore from a squashed eighteen-hour flight into orbit.

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Non-reproductive sexual behavior consists of sexual activities animals participate in that do not lead to the reproduction of the species. Although procreation continues to be the primary explanation for sexual behavior in animalsrecent observations on animal behavior have given alternative reasons for the engagement in sexual activities by animals. Observed non-procreative sexual activities include non-copulatory mounting without penetration, or by the femaleoral sex, genital stimulation, anal stimulation, interspecies mating, and acts of affection.

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We get the urge because our ancestors did too, even back to the earliest mammals and reptiles. The diversity of animals that have been caught taking a bit of alone time goes far, far beyond dogs humping legs. It should be no surprise to anyone that our primate cousins are champion masturbators.

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Ina psychotherapist and his wife adopted a two-day-old chimpanzee. They named her Lucy. For twelve years, Dr.

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But I doubt that this is the case. Dreams with erotic undertones are like most other dreams during REM sleep—runaway trains with a conductor who is helpless to do anything about the surrealistic directions they take. This conjuring ability to create fantasy scenes in our heads that literally bring us to orgasm when conveniently paired with our dexterous appendages is an evolutionary magic trick that I suspect is uniquely human. When it comes to sex, we put this capacity to very good—or at least, very frequent—use.

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Masturbation, or autoerotic manipulation of the genitalia, is a ubiquitous practice across human cultures, though most empirical research on the subject is heavily biased toward Western sexual behavior. Though masturbation occurs in myriad animals, human masturbation is typically coupled with imagined or observed sexual behavior, which may introduce a unique quality to the human manifestation of this behavior, particularly given the exceptionality of human imagination. Human masturbation is also likely more ubiquitous compared to other species, and may display distinct patterns, though social taboo limits access to extensive data on the subject.

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Lucy the chimp was an animal who settled the issue of nature versus nurture. This is a quandary that has plagued scientists and philosophers since time immemorial; a juxtaposition of biology, animal behaviourism, genetics and anthropology. A search for a complete theory of human nature.

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