The Thing in the Sink

There's a strange thing lurking in Peter's bathroom It looks a bit like a frog--but then again, perhaps it's a pig? Maybe even a dragon? It is green and slimy, and frankly it's getting in Peter's way. No one else seems bothered by it--but it's getting on Peter's nerves. He's awlays wanted a pet of his own, but really The thing will have to go. Trouble is, will it want to?