In the fairy tale “Pinocchio”, whenever Pinocchio lies, his nose will grow longer, and the more times he lies, the longer his nose will become. So, why is the protagonist in “Pinocchio” set to have his nose grow longer after lying, rather than other organs changing? In other words, is lying really about the nose? 　　The answer is yes. 　　The nose is a particularly sensitive human organ with a large number of nerve endings. When we receive stimulation from the outside world, these nerve endings will convert the stimulation into electrical signals and conduct them to the nerve center. Therefore, when the human body’s nervous system is working, the nose…