Two naked actors wrestle on a movie set. They are neither men nor women. They have no sex organs--just smooth skin between their legs.
One of the actors has the number 1 painted on its smooth chest. The other has the number 2 painted on its chest.
Number 1 blows cigarette smoke into number 2's mouth.
Then number 2 blows the smoke out through the artificial valve that has replaced its tummy button. This is incredibly funny for every one on the set who is watching, especially me.