Once upon a time I was at school. Please enter a comment. Communal showering is popular in northern China. In those days, I suppose it was quite likely that the teacher could have forced us! After written complaints, now boys are obliged to shower with their fathers or with their mothers but in the "children area". It's probably more healthy that kids are aware at that age of what each other looks like, normalizing bodies etc.
Where I come from totally underssing, whether with the same sex or not, is taboo; even if there were any communal showers nobody would use them and schools defintely can NOT enforce it on students or else we will have riots!!
What I had in mind was not only that, but also when there cubicles with one shower in each like this. The boys' shower was a communal shower. After that - in my culture - teens become sex obsessed and it's very male dominated. Is there any data supporting the claim that mixing genders in such a way causes developmental issues, and if so, what kind? I do not know how it is today in schools, but my guess is that many pupils still do not take showers after physical education lessons. Grade isn't nearly young enough to expect it to help any if you stuff kids naked together in one room