"you will need to know the difference between friday and a fried egg. it's quite a simple difference, 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 Adam /1952-2001/, in The Salmon of Doubt /2002/.