My Dad was stationed in Oz during WWII as a LT Cmdr. His assignment was to build air bases with the Sea Bees and set up medical facilities. There were single-sex bathroom facilities. Most of the nurses, etc., had no problem squatting over the unrinals. The men didn't give a damn, all these folks were fighting a WAR. None of the women were raped or mis-handled in those facilities. On the flip-side, I'm sure a lot of sailors and nurses took care of their sexual requirements; in/on a different venue. Nuff said.
What about when they had to take a dump?