For Children:  You will need to know the difference between Friday and a fried egg.  It’s quite a simpledifference, but an important one.  Friday comes at the end of the week, whereas a fried egg comes out of a chicken.  Like most things, of course, it isn’t quite that simple.  The fried egg isn’t properly a fried egg until it’s been put in a frying pan and fried.  This is something you wouldn’t do to a Friday, of course, though you might do it on a Friday.  You can also fry eggs on a Thursday, if you like, or on a cooker.  It’s all rather complicated, but it makes a kind of sense if you think about it for a while.

—Douglas Adams