system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do puppies always want to lick your face?
gpt
Licking to show affection is a functional behavior that puppies learn from their mother and littermates. Maternal licking and licking among littermates helps strengthen family bonds. A dog licking your face is expressing his affection for you and trying to strengthen the familial bond he has with you.