There was a cat at the sanctuary I volunteer at... he would lick anywhere that was exposed and he could reach.
I have to sit while scooping litter, because of my bad back...of course he always wanted my hands, but they were constantly moving, so sometimes he would lick my elbow instead.
I think licking tickles a bit... but it's better than love nibbles! A few of the cats like to nibble, some of them a little too hard! Never bled, but left marks when they got enthusiastic. One we named "Chomper", as she was the main nibbler. She got adopted a couple weeks ago. The licker had to be euthanized last week.