The manufacturer of cartoon scratching cave tells you that scratching furniture, home furnishings, carpets, etc. is a destructive behavior for humans; however, for cats, it is an innate behavior. Because cats need to shorten their nails to keep their claws in top shape. Additionally, by curling and stretching, cats can exercise their shoulders, legs, and claws.

The manufacturer of cartoon scratching cave tells you that, in addition, cats can scratch to keep their claws clean. If cats don't scratch, their muscles may be underdeveloped, which can lead to other health problems.
The manufacturer of cartoon scratching cave tells you that another reason cats scratch furniture may have to do with emotions. Cats have scent glands in their paws that don't emit the same strong scent as the musky scent of male cats, but each cat's scent is different. Cats have scent glands in their claws, and they can also leave scents when they scratch, and use this to swear to other cats or animals that the vicinity is their territory.
The manufacturer of cartoon scratching cave tells you that understand the purpose of cat scratching. Cats are not trying to cause trouble by scratching furniture. They are scratching furniture as a way to exercise their claws, exercise their legs, back muscles, and tone their bodies.
The above information is a cartoon scratching cave manufacturer's introduction and analysis of why cats need scratching boards, hope it helps you.