Dog is confused because licking is often a sign of submission and he’s freaked out by that. Dogs will do that if you try to lick them too. Licking their lips is a sign of nervousness probably bc he doesnt know why the cat is licking him.
If I make licking motions at my dogs, they just get excited and lick my face.
Animal behaviors can be very context and individual dependant. What I mentioned was very general and the submission aspect usually comes from face licking. Cats can be adverse to face licking sometimes due to the same reason (pecking order essentially) hence that video of the guy trying to lick his cat back after getting his face licked and the cat screaming and running away
Mom? Mom? Mooom?
The dog looks like “Duuude what the fuck!”