Marine and a Sailor enter a bathroom at the same time. After finishing their business, the Sailor walks to the sink to wask his hands, while the Marine walks to the door. In a "high and mighty" voice, the Sailor says to the Marine, "In the Navy they teach us to wash our hands after using the bathrooms." The Marine snorts, and throws this line back at the sailor over his shoulder as he walks out of the restroom, "In the Marines they teach us not to pi$$ on our hands."
In all seriousness though, the last thing you want to do in any public restroom is touch anything. For a class in bacteriology I did a research project where I cultured many different areas of many different public restrooms, and I grew bacteria everywhere, even the places that you touch after washing your hands.
I'm with you, man.