PECCAVI

I’ve read or maybe heard that 

Impeccable beings cannot 

Commit sins, not even

Such pleasant ones as lying;

It must be frustrating.

You say: I know a mammal

With feet like an otter,

And a tail like a beaver,

Who lays eggs. Oh yes;

It also has a duck's bill 

And one poison spur.

Reality groans and screams

And gives birth to a platypus.