A cat scratching your clothes with its paws could be because it's hungry and wants its owner to provide food, or it could be trying to show affection to its owner.
In addition, when a cat scratches someone, it may be trying to leave its scent on its owner, which can keep other cats away. The scratching action helps the cat leave its scent, but if the cat's behavior bothers or makes the owner uncomfortable, the owner can stop it.
