A new study suggests that long-tailed macaques in Indonesia practice tool-assisted masturbation. The researchers observed the monkeys tapping and rubbing stones against their genitals. Tool use is well documented in animals, although generally for survival purposes such as eating. Something is loading.
Tool use in animals is well documented, but researchers recently discovered monkeys in Indonesia that appeared to use stones in a very specific way: as sex toys.
While studying a population of 173 long-tailed macaques, the researchers observed the macaques patting and rubbing stones on their genitals and groin area, according to a paper published this month in the journal Ethology. The behavior led researchers to the “Sex Toy” hypothesis.
Researchers have evaluated the theory in several ways. They observed that young men were more likely than older men to participate in this behavior, and that it was often followed by sexual physiological responses, such as an erection. They also found that actions with the stone were associated with other sexual behaviors, such as riding.
Overall, the researchers said the data partially supported the theory that the behavior was “sexually motivated”. This means the monkeys appeared to be performing “a form of self-directed, tool-assisted masturbation,” Camilla Cenni, a doctoral student at the University of Lethbridge in Canada and author of the study, told The New York Times.
The authors said the paper suggests that monkeys over time may continue to use tools for behaviors, such as masturbation, that are not directly related to survival but have “pleasurable” or “pleasurable” aspects. self-rewarding”, such as “the underlying playful and sexual activities”.
Many animals are known to use tools. Otters use stones to open shells for food, such as clams and mussels. Dolphins use sea sponges to lift sand and discover prey on the seabed. And monkeys have been documented on video using rocks to crack nuts and shellfish.
Animals have also been documented masturbating with objects, although this is less common. Most of the tools used serve a clear survival purpose, such as eating.
“It’s probably not really adaptive or helpful,” Cenni told The Times of object-assisted masturbation.
The authors noted that the macaques observed lived in an area where they had regular access to human food, so they could spend less time foraging than other populations.