Dogs lick people for several reasons including showing affection , communicating, grooming, exploring, getting attention, and because they like the taste or smell. Licking releases endorphins in dogs' brains which make them feel calm and happy. This behavior is instinctive and learned early on, as mother dogs lick their puppies to clean and stimulate them. Dogs also use licking to enhance their sense of smell and taste, as parts of the human body like hands, face, ears, and feet have sweat and oils that carry interesting scents to them. Additionally, licking can be a way for dogs to seek comfort, show submission, or get their owner's attention. Sometimes, licking may also relate to stress or medical issues, but usually, it is a natural dog behavior expressing bonding and exploration.