I don't really care what they do. It's their world and I just live in it. I've lived overseas where male and female used the same public restrooms at the same time. Make sure you are aware of this practice before you get inebriated because it may just neutralize the effects of alcohol on your system when you are standing at the urinal and have a female walk in to use the stall. Especially if there is no door on the stall. If this happens to you, make sure that you are seen to wash your hands so that you won't be perceived as a neanderthal.