That reminds me of Sheldon Cooper's song from 'The Big Bang Theory'―'Soft Kitty, Warm Kitty, Little ball of fur, Happy Kitty, Sleepy Kitty, purr, purr, purr..." Doesn't it sum up what they want―something soft, cozy, which keeps them happy and warm. After having read the different ways, aren't you a bit envious of a cat's life?