Kneading is an instinctive behavior in cats, originating from their kittenhood. When kittens nurse, they massage their mother's breasts with their front paws. This action helps stimulate milk production, ensuring the kittens get enough food. This behavior is usually retained in adulthood, becoming a sign of relaxation and pleasure.
When cats knead, they usually show a satisfied and blissful expression, which may be because kneading brings a sense of psychological comfort and memories of their kittenhood.
