This study was supported by [11] where higher ranking adult females of long-tailed macaques received more grooming by the other subordinate females. Besides on the hierarchy, adult females often groom the bigger size males. This study was supported by [2, 22] who found that male long-tailed macaques were usually groomed by the females. This may be due to female long-tailed macaques needs to obtain protections and also sharing of food from the males. This study was supported by [19] which state that females groom their mating males for the sake of protection and to share food.