Two photogs are in the men's room at the urinal. One guy is a Canonian and the other a Nikonian. The Nikon guy finishes his business first. He simply zips his fly and heads for the door. As he was leaving, the Canon guy turns his head towards him and says "Excuse me, but us Canon photogs wash our hands when we are finished urinating". The Nikon guy says " I understand, but us Nikon guys don't pee on our hands"