Скачать или смотреть Grooming - allogrooming - baboons

Alpha male Stickdrew and Alpha female Robin enjoy a grooming session. They participate in grooming several times a day.

All primates, from monkey to man, rely on social touch. Asides from keeping a healthy, parasite-free coat, grooming plays an even more important role. Among non-human primates, grooming is a tool used to garner favours, earn social standing, and increase access to resources.

It has long been known among animal behaviour researchers that physical contact is critical for proper social and emotional development.
According to anthropologist Robin Dunbar, this works because grooming stimulates the release of endorphins – opiates produced by the brain that trigger feelings of relaxation by lowering the heart rate, reducing overt nervous behaviours like scratching, and even bringing on sleep.