Many cats in other families will smell their owner's mouth. Why do cats need to hear people's mouth? This is not because the cat is sick! Cats sniff people's mouths to feel their owner's scent, which for them represents a sense of security and warmth.

After the owner goes to bed, the cat is confirming whether the owner is alive. It also touches the owner's face with its claws, and even licks the owner.

The cat smells the owner's mouth when playing with the owner, just because it is curious and expresses its favorable feelings. Moreover, the cat has a very sensitive sense of smell. It also smells the same mouth when it is with the same kind.

Usually, when cats identify their owners, they will familiarize themselves and distinguish them through their sense of smell. Therefore, when the cat approaches the owner's mouth, they will smell it, and even rub their heads against the owner.