This is nonsense humour at its finest. It reminds me of the childhood stanza:
"Ladies and Gentlemen [sometime pronounced 'Jellybubbles' or 'Jellybeans'],
I come before you to stand behind you,
to tell you something I know nothing about.
On Monday which is Good Friday,
there will be a mothers' meeting for fathers only.
Admission is free,
pay at the door;
Bring your own seats
and sit on the floor"
There's another one about going downstairs to clean the attic, but it escapes me at present.