Did Scooby Doo ever licked face?
While Scooby Doo is known for licking his own lips and drooling, there's no evidence in the show that he ever actually licked anyone's face. He's more of a "Scooby Snacks" and "Ruh-Roh" kind of guy, not a face-licker!
Of course, cartoons often have their own logic, so maybe there's a hidden episode where he surprised everyone with a face lick. But for now, we can safely say that Scooby Doo's face licking is a mystery that remains unsolved.