Ira sent me a link last week to a picture that illustrates the real reason your bed exists, at least if you own a cat.
The post was up at a LiveJournal Russian Cats Section, so take a look if you like cats.
Anyway, enough of the blurb for now, onto the picture…

However, the situation does change a bit when you have two cats; for example unless it is cold, Karra and Muska will normally only sleep on the bed if the other is not already there. I have also had to learn to move slowly in the morning, when getting up, as nothing starts the day badly more than accidentally kicking your cat.