For cats, licking is not only used as a grooming mechanism, but also to show affection. By licking yourself, other cats, or even other pets, your cat creates a social bond. Some of this behavior may come from the kitten when your cat's mother licked it to groom it, as well as to show her affection and affection. For cats, licking is mostly a sign of affection or a method of cleaning, since cats lick themselves (or kittens) to groom themselves.
However, cats also lick each other to show various types of affection. A lick from a cat could indicate that it is marking its territory or reminding you that you are part of the family. Even if you can't read a cat's mind, you can be sure that your cat is licking you because he likes you. Another reason cats sometimes lick other cats with which they are attached is so that they can share their scent, transferring their saliva so that the other cat smells more familiar.
This helps them to say, with a simple sniff, that the other cat is part of their social group and, therefore, can be trusted. By licking you, your cat could simply mark you as safe and let you know that you are part of the family. One of the sweetest reasons your cat licks you is to show you affection. This is essentially a form of social union, similar to the one where your cat snuggles you in your lap.
It's best to get used to washing your hands after preparing food and not letting your cat lick you if you have recently applied lotion, perfume, and other skin products.