When the last of the animals had filed aboard the Ark two
by two, Noah called in a demanding voice.  "OK, folks,
listen up!  There will be NO, repeat NO sex for the duration
of this trip.  Separate accommodation has been provided for
everyone, but just to make sure, all you males are to parade
past my sons who will remove your penises and I will sit over
there and write you a receipt.  After we see land, you will
have your penises re-attached."

Ten times a day, every day, Mr. Rabbit would storm into his
wife's cage in a highly anxious state and demand "Quick! Get
on my shoulders and look out the window to see if there is
any land out there!"

Mrs. Rabbit would obligingly climb onto his shoulders and
look out the window with always the same result.

"Sorry, honey, no land yet."

"Damn!" Mr. Rabbit would grumble and hop dejectedly back to
his own cage.  This went on day after day until Mrs.Rabbit
finally got annoyed.

"What is the matter with you?  You know it's going to rain
for forty days and forty nights.  Only after the rain has
evaporated will we be able to see land.  Why are you in such
a rush?"

"Look! Look!" cried Mr. Rabbit as he held out a piece of paper.
"I GOT THE DONKEY'S RECEIPT!!"