Someone has to do it. It's all very well calling for eye of newt, but do you mean Common, Spotted or Great Crested? Which eye, anyway? Will tapioca do just as well? If we substitute egg white will the spell a) work b) fail or c) melt the bottom out of the cauldron? Goodie Whemper's curiosity about such things was huge and insatiable*.* Nearly insatiable. It was probably satiated in her last flight to test whether a broomstick could survive having its bristles pulled out one by one in mid-air. According to the small black raven she had trained as a flight recorder, the answer was almost certainly no.
Terry Pratchett