We never actually see the end to his urination—“Evacuation (eternally not) complete.”
While it might be lesser-known, the urination scene in this film is undoubtedly the most memorable part.
Two small openings roughly equal to the diameter of a matchstick are left for urination and menstruation respectively.
urination u·ri·na·tion (yur'ə-nā'shən)
The passing of urine. Also called emiction, miction, micturition, uresis.
urinate u·ri·nate (yur'ə-nāt')
v. u·ri·nat·ed, u·ri·nat·ing, u·ri·nates
To excrete urine.