The chapter opens with a description of the underground wing of the "Dirisica underground" experiment, where the devil and the human are restrained during sex. Since the devil cannot move freely, the human has to take the lead in sex. The blindfold is a symbol of the devil's imprisonment, and the mask protects the mouth. There are also waists, limbs, and a chest with a strain-ts chest, which can be used to release the prisoner. The chest can also transmit information to a doctor. The mask also allows the prisoner to communicate with the doctor, who can interpret the words on the chest.