Well, at least until Youtube gets on the Intarwebz.
Rainbow Banned Episode by SuperUbuntu
The back story: Rainbow was a British children's story aired from 1972 to 1992. This non-aired "adult" version was shown at the 1979 Christmas Party. Of course it's full of innuendo. Of course it made it to the Internet.
Posted not just for the amusement value (safe for work, unless you work at a very strict place) but as a reminder that three people can keep a secret if two are dead.