“If we had some ham, we could have ham and eggs...if we had some eggs.”
Old depression era joke.
That joke actually predates the depression. I collect really old records and have a recorded comedy skit from 1922 that repeats the joke verbatim. In fact, the joke may have originated with this recording. Luckily, the same recording is available free online: http://ia700202.us.archive.org/10/items/CollinsHarlan_part1/CollinsHarlan-HamEggs.mp3