Yes, there are meaningful differences, geographical and temporal. If you travel and live long enough, there are plenty of opportunities to see it.I don't think it's relevant to the topic because, contrary to many here, I do not believe there are meaningful cultural differences with regard to men taking showers in changing areas. However, I believe there are many posters here who fantasize about such differences or who claim such differences exist without any data to support their contention.
You can of course believe in whatever you want. Many people believe that Jesus got up from his grave after dying.