Grew up in north German / Scandinavian countries, where 'nudity' is regarded very differently to, well, lets say many other places.
I was involved in the induction and orientation programmes for a global corporate for many years, which provided plenty of interesting stories. Talk of topless bathing has reminded me of the experience of one young man, straight out of uni, pleased to get a trainee ship and a bit dazzled to find himself on the week long induction course on the other side of the world from home. These course s tended to be held in hotels with quite good facilities, which everyone was encouraged to use in their brief periods of downtime. He was brave enough to try the sauna and horrified when a woman approached him, clearly upset with something he was doing, as he sat in the sauna, on his towel in his bathers.
He thought he had upset her by somehow getting into the women's section. From previous experience, we were fairly sure that the sauna would be unisex and that she would have been telling him how unhealthy it was to be sitting in bathing trunks rather than with all skin exposed to the air.
The most difficult part of the course was always the section on different cultures, but there was no shortage of material. It was also where I first came across the idea that things are different in different countries, in our increasingly global world, people doing a similar role, especially for the same global corporate, will have a lot of experience in common, too, which their previous peer group, who had not moved countries, would not recognise.