my 6 year old border collie insists on licking me between my upper lip and nose upon greeting me when I get home. If I avoid him or appear busy, he just waits for a more opportune moment.
He's big on sniffing people's faces to get to know them, and as he is large and wolfish for a border collie, it sometimes unnerves people who don't really know him.
Big chompy wolf teeth and eyes too.