Wally Boag used to do a teeth-spitting bit in the Golden Horseshoe Revue, he did the same bit when he guested on the Muppet Show.
"Pink Elephants on Parade" and "Heffalumps and Woozles" are good "under the influence" tunes.
In "Little Shop of Horrors" there's a very funny song called "Dentist," by Howard Ashman and Alan Menken. I'll bet you've heard of them.
