Why do cats lick people, Thomasina? My cat licks my hands all the time. Does that mean she loves me?
— Curious Cat Mom
Cats lick people for a few reasons, and one of them is love!
Sometimes being around a human we like and trust brings out the mom cat in us, too. Just like our mothers licked us when we were kittens to keep us clean, some cats lick people to get all that invisible (to you) dirt off.
Cats Lick People With Invisible Sponges