"Five hundred and one million of what?" repeated the little prince, who never in his life let go of a question once he had asked it.
The businessman raised his head.
"During the fifty-four years that I have been living on this planet, I have only been disturbed three times. The first was twenty-two years ago by a cockschafer who dropped down from goodness knows where. He made the most awful noise and I made four errors in my sums. The second time was eleven years ago by an attack of rheumatism. I don't get enough exercise. I have no time for slacking. I'm a serious man. The third time... well this is it! As I was saying, five hundred and one million..."
"Million of what?"
-- Antoine De Saint-Exupery, The Little Prince (Indialog 2006): 58-9
These are great. There's another list of this sort out there, but it's smaller and has a less elegant title. Somebody should combine them. See Words That Sound Naughty, but Aint For some reason this list reference syntax never works.