As Frank Loesser could have written:
He goes a mumble, mumble, mumble with his left hand
He goes a tinkle, tinkle, tinkle with his right.
Mumble, mumble, mumble
Tinkle, tinkle, tinkle
He could give insomnia to Rip Van Winkle.
(I love Madeline Kahn's version of the song, which is really Rumble, Rumble, Rumble and is available on Kritzerland Records' Frank Loesser Revisited.)