As stated previously:
Rather like Blair's negligent wish that relaxiing licening laws would of itself create a continental cafe culture, the move towards North European mixed changing facilities will not carry with it the social culture that goes with it to make it work.
In the lands of the sauna, there is mixed social nudity, but there is also a very busybody sense of public decorum. Complete strangers will call you out the second you step out of line and fail to follow the unwritten rules everybody is expected to know and observe.
E.G, scene in the Swedish film Kanninmannen where the pervy PE teacher enters the girls changing room and they mass like geese and advance on him telling him to 'fuck off! fuck off!'