masturbation to prevent the pipes from clogging, which can lead to the back up of sperm that flows directly to the brain causing awkward sexual advances, undue violence, and masturbation in creative and sometimes inappropriate places.
I should clean the pipes before that date tonight.
Urination by a man following an act of masturbation or sex. Presumably any semen left in the tip of the penis will be cleaned out by the pressurized urine stream.