I've only had one cat who liked to lick feet, but she liked to lick anything that stuck out from the sheets and she thought needed cleaning. I had another cat who liked to floss her teeth in a friend's beard (we said she was digging for leftovers). We have one cat now who likes sleeping on the stinkiest dirty clothes (she selects the basket carefully).

I just worry that Jackson will get really hurt nibbling on my fingertips because of my scraping the roof of his mouth. It doesn't stop him when it happens. The only thing that seems to dissuade him is my using lotion on my hands (he won't bother me at all - prefers his fingertips clean), but I have trouble sleeping with lotion on my hands (tend to wake up, rub my eyes and get the lotion worked in *real* well).