From a Scottish Rotarian:

All this talk of worms reminds me of the Church of Scotland minister and temperance speaker lecturing to a school full of primary school children:

"Before I continue, I want to show you something!", he says, reaching into his pocket, and producing two earthworms. He then places one in a glass of clear fluid and the worm wriggles around happily. He then places the other in a glass of amber fluid and the worm starts to convulse and dies. "This second glass contains whisky." he continues, "Can any child here tell me what this demonstrates?" After a minute, Wee Angus puts up his hand, and on being asked to reply says "Aye, if ye drink enough whisky ye won't get worms"