Cats strengthen their social bonds by grooming each other. In the wild, cats belonging to the same family frequently engage in this interaction to enhance their cohesion and sense of belonging. Although domestic cats typically live alone, they still retain this social instinct.
In addition, by licking each other's fur, cats can more effectively remove dead skin, loose fur, and dirt. Furthermore, this behavior can help cats relieve stress, as the act of licking itself has a soothing effect.
