What happens when you lie? Do you get warts? Does it stunt your growth? Does it make your friends not like you anymore? Unfortunately, it's a lot worse than that. It's an ugly list, and even Merlin the Magician throws in his two cents worth.
As children, we all remember the things our parent told us that later in life we discovered weren't actually true. Things like, if you don't keep your ears clean, carrots will grow out of them is just one of many I remember.