I used to have two black cats. Always told people they were good luck. One lived to nearly 19, the other to nearly 18. Your cats are cool. Treasure them...
Yeah, you sort of live with stuff like that. There is cat hair in whatever you wear, drink, eat and sleep on. My current cat has a habit of waiting for me to shower and dry off, then he rubs all over my bare legs. You either love cats or else it drives you nuts. Cats can make you deathly ill, your germs don't hurt them in any way. And yes, somehow they manage to hold that litter in their paws until they decide to leave it somewhere else.