"The human body as a whole is pictured by the phantasy of the dream as a house, and the individual organs of the body as parts of the house. In toothache-dreams a vaulted vestibule corresponds to the mouth, and a staircase to the descent from the pharynx to the oesophagus; in the headache-dream a ceiling covered with disgusting toad-like spiders is chosen to denote the upper part of the head." 
 
-- Sigmund Freud, The Interpretation of Dreams

 
BACK