Obsessional prohibitions are extremely liable to displacement. They extend from one object to another along whatever paths the context may provide, and this new object then becomes, to use the apt expression of one of my women patients, 'impossible' - till at last the whole world lies under an embargo of 'impossibility'.
Sigmund FreudDo you not know how uncontrolled and unreliable the average human being is in all that concerns sexual life?
Sigmund Freud