Dogs lick everywhere because dogs express their emotions through licking. The first thing a dog feels when he is born is his mother’s tongue. Therefore, when a dog grows up, he will also express his love for his owner by licking. Dogs lick themselves to clean their coat. But often licking everywhere may also mean that the dog is sick. If you often lick a certain part of yourself, it may be a skin disease or other disease. If you often lick the wall, it may be a lack of minerals and trace elements.