Was in Beijing, China, many years ago and at the airport, about to return home, my travel companion and myself both went to the men's room before boarding the flight.
It was a long urinal all along one wall with room for 10 - 15 men. Being at an airport, the men's room was quite busy and we soon found out that staring at a stranger's private bits is not considered inappropriate at all by the Chinese. We found ourselves with about 24 - 26 eyes all staring at us. Very odd experience for a "westerner" indeed