In the public’s mind, cats hate water, and thus they hate bathing . . . so using a cat image in soap advertising doesn’t seem to make sense, except that people also know that cats are fanatically clean.
Thus more than a few soap companies have used cats in ads for soap, including the famously pure Ivory Soap, which has been around since 1879. One Ivory Soap a from more than a century ago showed a snow-white cat surrounded by twelve malicious-looking dirty gray cats. The ad had a one-word caption: “Envy.”