Cryptic Note Poem by Ima Ryma

The wife left me a note to read,
But I could not understand it,
Must be a cryptic note indeed,
And I threw the note in a fit.
The note did flutter through the air,
Seeming to mock me in a way,
Landing upon my easy chair.
I walked over to where it lay.
Surely did not want the wife to
Find out I could not read her note.
But on the chair I looked and knew
Right away what the wife had wrote.

I could read her note, but did frown.
The wife wrote the note upside down.