Jk and Shaki (Adult Macaque Monkeys) Grooming Their Dad

Before Jk and Shaki Sleeps, They first always groom me. As you guys may know "Social Grooming"is used between macaque monkeys as a sign of friendship. But grooming involves also cleaning and maintaining their body function and hygiene. In the wild primates also use grooming to keep their body temperatures low and adapt to any type of weather.