Oh, there's plenty of reasons. I just don't know which one.

Humans! They lived in a world where the grass continued to be green and the sun rose every day and flowers regularly turned into fruit, and what impressed them? Weeping statues. And wine made out of water! A mere quantum-mechanistic tunnel effect, that'd happen anyway if you were prepared to wait zillions of years. As if the turning of sunlight into wine, by means of vines and grapes and time and enzymes, wasn't a thousand times more impressive and happened all the time.

This was not a fairy-tale castle and there was no such thing as a fairy-tale ending, but sometimes you could threaten to kick the handsome prince in the ham-and-eggs.

It is said that whomsoever the gods wish to destroy, they first make mad. In fact, whomsoever the gods wish to destroy, they first hand the equivalent of a stick with a fizzing fuse and Acme Dynamite Company written on the side. It's more interesting, and doesn't take so long.

You can't map a sense of humor. Anyway, what is a fantasy map but a space beyond which There Be Dragons? On the Discworld we know that There Be Dragons Everywhere. They might not all have scales and forked tongues, but they Be Here all right, grinning and jostling and trying to sell you souvenirs.

It looked the sort of book described in library catalogues as 'slightly foxed,' although it would be more honest to admit that it looked as though it had beed badgered, wolved and possibly beared as well.

I don't want unnecessary violence, sergeant," said Blouse. "Right you are, sir!" said the sergeant. "Carborundum! First man comes through that door runnin', I want him nailed to the wall!" He caught the lieutenant's eye, and added: "But not too hard!