Making a puppy face can be a very efficient means of body language communication. The head is slightly tilted downward, the lower lip protrudes and the eyes look straight up at the other person. The purpose is to make one look slightly vulnerable and childlike with the intent of getting out of having to do what one does not really want to do or to plead forgiveness. The person making a puppy face might also simply want to gain sympathy by looking “cute”.
It can also signal shyness and to a certain degree or be used as a plea not to expect too much. The puppy face is often pulled to provoke a smile in the other person and thus “to break the ice.” Perhaps the most well-known puppy face maker was Lady Diana — at least in her younger days — and at the beginning of her career as crowned Princess.