Jock once attended a Temperance lecture given by Scotland's top medical man, a noted anti-drink campaigner. The speaker began by placing a live, wriggling worm in a glass of whisky. After a moment or two it died and sank to the bottom.
The speaker said quietly to the audience, "Now my friends, what does this tell us?"
Jock piped up, "If you drink whisky you'll not be bothered by worms!"