I have two five month old calicos. I have had a cat most of my life, I am now 23. I had a Tabby cat that died when he was 17 and I was 20. My two kittens love to lick my hands, but my old cat never had this trait. I think its adorable and I dont mind at all, but what is the reason behind this behavior? Why do they do it and my old cat didint? Both cats were/are very affectionate. Is it a form of affection or is it the natural saltiness of human hands?