The reasons why dogs like to lick their owners’ faces and mouths:

1. Dogs have enjoyed the warmth brought by their mother’s tongue since they were born. The mother uses her tongue to comb the baby’s hair, Express your love. Naturally, dogs who grow up also like to use their tongues to express their feelings.

2. Dogs licking human faces is generally more common between dogs and their owners. Dogs express their obedience and love to their owners by licking their owners' faces or hands.

3. When the owner reprimands the dog, the dog will feel scared and nervous. In order to calm the owner's anger, the dog will also lick the owner's mouth to make the owner forgive him and calm down the owner's anger. .

4. Sometimes dogs not only lick their faces, but also their mouths. Dogs licking their mouths are a habit that they have developed since they were young to ask for food from their mother. It also has the function of showing obedience to dogs with higher status. As the owner is the leader of the family, the dog will also lick the owner's mouth to show trust and obedience.

5. Dogs are greedy. When you eat delicious food, the dog will also want to eat it, and then it will lick your mouth to signal you. This is their request. One of the ways of eating.