The excremental is all too intimately and inseparably bound up with the sexual; the position of the genitals—inter urinas et faeces—remains the decisive and unchangeable factor. One might say here, varying a well-known saying of the great Napoleon: 'Anatomy is destiny'

On the Universal Tendency to Debasement in the Sphere of Love (Contributions to the Psychology of Love II) (1912), in James Strachey (ed.), The Standard Edition of the Complete Psychological Works of Sigmund Freud (1957), vol. 11