Why do monkeys eat twist-whole twist?

Two-part allegorical saying is a unique language art in China. It is humorous, subtle and full of fun. For example, "A monkey ate a twist-a whole twist". As we all know, twisting a few strands of flour and frying food means the opposite; Full torsion is just the opposite. This two-part allegorical saying changed to "people eat twist" seems dull, and changed to other animals to eat twist, which was not accepted by people, so "monkeys eat twist" became a convention.