the dream the dreamer, instead of being woken up, is taking the child for a walk … him to a street corner where he is micturating … the stream of water produced by the micturating boy
Freud demonstrates how the dream-work incorporates a urinary stimulus as symbolic content, elaborating it into increasingly grandiose imagery rather than permitting the dreamer to awaken and respond to the real need.
, The Interpretation of Dreams, 1900thesis