When is a raven like a writing desk?

When is a Raven like a Writing desk?
As a child, i always loved Alice In Wonderland.

This riddle is designed to not make sense - The author Lewis Carroll, has never intended for there to be any real answer to this question. The whole point of the riddle is that it has no answer, although loads of  people have come up with lots of differnt creative interpretations of the riddle. It has always puzzled me to be honest - Why would you want to write a riddle with no answer? The most annoying thing of it all is that however much i try to work out what Carroll means, there is no way we will ever know, as Lewis Carroll died on January 14th in 1898 at the age of 65, due to Pneumonia. I think it is one of those things that Carroll has just added a famous twist and puzzle to the incredibly famous book of Alice In Wonderland. It's such a beautiful book - i think every child should be read it wen they are small. In some ways, Alice reminds me of myself, as she is overly inquisitive and always searching for the next new thing. This riddle ... "when is a raven like a writing desk?" just adds to the beauty of an incredibly beautiful book.

A Storybook Fantasy

Once upon a time a beautiful girl of 15 sat in a gold embellished tower way up high with a dragon to guard her, a pea under her many mattresses, and hair that reached down to the floor. You may think i am talking of a mish-mash of different books read to me as a little girl. But in fact, these enchanted novels are just figures of imagination. No-one would lock their daughter in a tower with a dragon to guard them, no matter how rich they are. These stories, magical woods, evil witches and beautiful princesses shatter the dreams of little children that no, they cannot be a princess when they grow up, but are more likely to work in an office behind a computer. This wish wash of happiness and comical creatures give children the impression that every wood they walk into is enchanted, is full of talking deer, and has a cottage full of dwarfs in the middle. Hate to break it, but things dont always have a happy ending. Many times than not things never happen as planned - and although this isn't necessarily bad, it can be very frustrating when things don't go according to plan. Life ISN'T a fantasy, and children need to stop being told it is.
  So next time you sit down with your child or children for a lovely comforting bedtime story, spare a moment of thought for yourself? Is this really just a happy story full of princes and princesses?