" The Rum Tum Tugger is a Curious Cat:
If you offer him pheasant he would rather have grouse.
If you put him in a house he would much prefer a flat,
If you put him in a flat then he'd rather have a house.
If you set him on a mouse then he only wants a rat,
If you set him on a rat then he'd rather chase a mouse.
Yes the Rum Tum Tugger is a Curious Cat -
And there isn't any call for me to shout it:
For he will do
As he do do
And there's no doing anything about it! "

― T.S. Eliot , Old Possum's Book of Practical Cats