Dogs lick often and for a variety of reasons. For example, mothers lick their puppies to clean them and from about six weeks of age, some pups lick their mom's face and lips when they want her to regurgitate food for them.
Communication in the pack
Adult dogs lick as a sign of deference or submissiveness to a dominant pack member. The dog receiving the face licks shows its dominance by standing tall to accept the gesture, but doesn't return the favor.
But what is your pet saying?
He may simply be letting you know that he's glad to see you. Or he may be hungry and asking for a snack. Obviously, you won't regurgitate some food at that signal, but you might give him a treat.
Is it puppy love?
While it's probably not a "kiss," you can bet it's a sign that your dog thinks you're pretty cool! If your pooch licks your face and that action is greeted with positive attention, such as hugs and human kisses, he'll definitely want to repeat the behavior!