It is quite natural for a human male penis to erect at night, but chimpanzees also learned that a male penis erects at night, Christine Harbor Camp, a professor at the Wildlife Research Center of Kyoto University (a graduate student at the time of research). Discovered by Professor Satoshi Hirata and others.While observing the sleeping condition of the chimpanzee, I found it by chance.

 According to Kyoto University, harbor camp specific researchers installed video cameras on the bedrooms of 12 male chimpanzees at the Kumamoto Sanctuary, Kyoto University Wildlife Research Center in Uki City, Kumamoto Prefecture, for a total of 6 days, 72 days for each individual. The sleep state was observed.

 As a result, nighttime penile erections were observed in 8 chimpanzees, of which 4 to 6 were masturbating after the erections.One of them has a phenomenon that seems to be ejaculation.

 This is the first time that a non-human primate has discovered a nocturnal penile erection.Harbor Camp researchers believe that nocturnal penile erections are not a human-specific phenomenon and may be widespread in other mammals.

 Since this research is a research that describes that it was unexpectedly recorded in the recorded video image, the Wildlife Research Center of Kyoto University has no future research plan and has no plans to continue the research.

Paper information:[Behaviour / Brill] Spontaneous nocturnal erections and masturbation in captive male chimpanzees (Pan troglodytes)

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