With all my cats: I like to do a cat scratch gesture like catwoman from a distance while we all laze around (again, from a distance).
Its like miming scratching a non-existant surface and they intuit that the imaginary surface I’m scratching is them.
Also “we” call scratching “scratcheese” lol
I taught my dogs to give “Eskimo kisses”.
Same with cats, pretty universal signalling of affection [1/2-sandwich nose to 1/2-sandwich nose] hehe
It comes a little less naturally to dogs than to cats.