The reasons why cats like to lick people’s hands:

1. Cats love to be clean and often lick their own hair to clean dirt. Cats licking people’s hands may I feel my hands are dirty and want to help others clean them.
2. When a cat likes or trusts its owner, it will express its love by licking the owner's hand.
3. When a cat smells the smell of other pets on its owner's hands, it will want to lick the owner's hands to leave its own scent and want to possess the owner.
4. If there is the smell of food residue on the owner's hands, the cat will also lick the owner's hands.
5. When a cat feels unwell and wants to seek help from its owner, it will keep licking its owner's hands.