The superstition of "nine lives" suggests that cats, particularly domestic cats, possess the ability to survive situations that would be fatal to other animals. This belief likely stems from their agility, resilience, and ability to escape dangerous situations, leading people to think they have multiple chances at life. The origin of this superstition is unclear, but it is prevalent in various cultures. In Western folklore, cats are often associated with mysticism and good luck, which may have contributed to the idea that they can cheat death more than once.