We had a particularly licky dog. She was short, and when people bent over to pat her, she had this knack of jumping up and sticking her tongue all the way down the person's throat.
Nobody enjoyed that, so I think that would be a 10.
Discussion
Nice. I think I've encountered something similar once lol. Mine will sometimes leap up and nip at your lips (ever so lightly you can feel her teeth) when she's happy to see you and you reach down. A real exercise in trust