So back to Peter's question, why is the eye in the bottom of the chamber pot?
who is behind the joke (so to speak)?
Various versions are to be seen in this little potty lot:
"if you keep me bright and clean, I won't disclose what I've seen"
"use me well and keep me clean, and I won't tell what I have seen"
"keep me clean and use me well, what I see I'll never tell"
Two figurative potty jokes in the collection:
and a fitting flatulent finale, below: