Why do people love the smell of puppy breath?

The puppy smell of breath (and bodies) comes from their diet of mother’s milk. This substance contains substances, like carbohydrates, fats, and proteins, that create this sweet milky, sometimes musty, sometimes creamy or vanilla fragrance of puppies which many of us find to be pleasant and enjoyable and some claim to be reminiscent of freshly-cut grass, sweet fruit and even baked bread or fresh popcorn.