There was a man who wanted to find the perfect gift for his wife. He went to the store and asked the salesclerk and asked him what he should get his wife. The salesclerk brought out a parrot. The salesclerk said, this is no ordinary parrot, if you light a match under it's right foot, it plays Silent Night, if you light a match under it's left foot, it plays Santa Claus is Coming to Town. The salesclerk made sure to tell him that the name of the parrot is Chet.
The man thought it would be great, so he took it home. He let his wife open it early, since it was a living thing. He told her what great songs it played. They wondered what it would play if they lit a match under it's crotch. So, they did. The parrot sang "Chet's Nuts Roasting on an Open Fire."