Once upon a time, there was a giant that sneezed every time the words "Once upon a time" was spoken. For example, the giant sneezed twice in a very short time not too long ago. Every night, he would tell his children bedtime stories and four words into the story he would always have to sneeze. His children never seemed to understand this, but the giant found this extremely annoying to live with.
One day, after telling a frame story to his children which included the dreaded phrase not once, but twice, he got sick of sneezing and set off on a journey to see a witch with the power to do anything anyone might need to be done.