Cats never feel threatened. They are genetically incapable of accepting that anyone could possibly dislike anything as perfect as a cat.
You must set down all the rules to your cat at the beginning of your relationship. You cannot add rules as you go along. Once these rules are set, you must never, under any circumstances, break any of them. Dare to break a rule, and you will never live it down. Trust me.
Cats can derive their nutrition from the air they breathe until you get the message that the Fish Fin Buffet you put in their bowl three days ago will never be acceptable.
Cats may sense early on that you don't like paw prints on your butter, but they will jump onto any surface in the home as long as no one sees it happen.