This is why Norm MacDonald is brilliant (and Conan O'Brien facilitates wonderfully).
I have watched this bit many, many times, and it still cracks me up.
What strikes me is another comedian could take the bones of the joke (moth, podiatrist, punchline) and get zero laughs, because it's an anti-joke in the tradition of
The Aristocrats.
Just... brilliant.
A quantum state of signature may or may not be here... you just ruined it.