The Three Toilets

There were three beautiful toilets. One was made completely out of wood, one was made completely out of metal, and the other sang a song every time you sat on it. One man bought each toilet.
The next day, the man who bought the wood toilet said, "My toilet gave me splinters!"
The man who bought the metal toilet said, "My toilet seat was cold!"
The man who bought the singing toilet said, "Every time I sat on mine, it sang 'Do you see what I see?'"