My Gizmo does the same thing. Sunday when I went to pick him up from the groomer she tells me "He's something else!" Now I'm sitting there getting nervous thinking she's going to tell me he did something bad then she says.."He wouldn't stop licking me the whole time I was grooming him...my face, my hands, my shirt..He's so lovable!!" I was like
That's my Baby!! When he's in the car the only way to keep him from crying is to let him lick my fingers from the time we leave until the time we get to our destination! Must be a Yorkie trait because years ago I had a toy poodle and he wasn't into licking like Gizmo is!!
http://i2.photobucket.com/albums/y15.../Yorkie001.jpg