Quoting from the October 10 posting by Carrie Dow:
"Ever wonder why your cat does the things he does? Scratching is one of the habits that all cats have as a part of their normal behavior and they have reasons for doing so. If you have issues with your cat scratching furniture and other possessions, read these tips from the Cat Care Society of Lakewood to learn more about the behavior and how you can redirect, not prevent, scratching to more appropriate places."
Link to learn why cats scratch