Kids and pets--you can't have them without a little dirt and destruction. We've had a cat that chewed on wood, and now we have a cat that chews on plastic. He especially loves the aglets on the end of shoe laces, but he gets so into them, that he ends up shredding the entire lace. We're very good about keeping our shoes put away! He forces us to keep the house tidy, as we don't dare throw a purse on the floor or leave vinyl items lying about--unless we don't mind a few holes!
(She looks remarkably like a British blue cat I used to own, called Brian. Ah, nostaglia.)