Cats definitely treat their human counterparts as if they were other cats. You’ve probably had your cat lick you, rub their head up against you, and make biscuits on your belly. Cats may look at their humans as simply bigger cats (that’s incredibly adorable). It’s unknown if they understand the differentiation between species or it could be that they recognize the difference and don’t care (that would be so typical of a cat!). Either way, they treat us the way they do other cats.