While it is true that cats have a natural instinct to scratch and dig in soft materials, there is no scientific evidence to support the claim that they will automatically seek out a place to relieve themselves when they need to go. In fact, most experts believe that cats will only use a litter box if it is clean and comfortable, and if they have been properly trained to do so. If you are having trouble getting your cat to use the litter box, it may be helpful to consult with a veterinarian or animal behaviorist for advice.