I think it’s an old song, knowing which would make the line in the movie funnier.
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There is a Cole Porter song with the line:
Do do that voodoo that you do so well.
The song is called “You Do Something To Me”.
(I have never watched “Blazing Saddles”, as I think it would be too crude for my tastes. But I know that my sons liked it.)
Blazing Saddles..to Crude !?!
No Poopy jokes.
Campfire scene is rather torrid.
I can’t stomach SpongeBob Square Pants!