Cool. I just got his reply:

> Tod disagreed, claiming that it was in wide usage before Robin did that bit.

"I doubt that very much. The latest slang dictionary by Jonathon Green dates "Mister Happy" (=penis) to "1980+" -- the time of the Robin Williams performance, which I also happened to see (on video). Robin made it popular and perhaps coined it, also his "one-eyed trouser snake." Robin deserves full credit for its popularity.

The "Mister Happy" from the UK books is older, but it was Robin who publicly (TV, gigs) used that appellation for the first time to mean "penis" and spread its use. There *may* have been raunchy cartoons or porno books where the dick was called "Mister Happy," but they were not the source for its popularity in U.S. English and now worldwide."