Regardless of whether these types of behaviour is for the purpose of cleaning or sharpening the claws or just to stretch is debatable, but the conduct is innate; kittens lifted in isolation shortly begin to claw objects. There is a number of science to find out about our feline buddies https://www.propanraya.com/pentingnya-cat-primer-untuk-hasil-pengecatan-sempurna-dan-tahan-lama