It's always embarrassing being exposed to classmates like that. At my primary school (up to age 11) we had a weekly sports lesson at a local park with compulsory group showers afterwards, from about age 9 until we left, and we soon got used to that, but when we went to secondary school at 11 things ...
My experiences with gang showers consist of Boy Scout summer camp when I was 13 and post-run showers on the high school track team ages 16-18.
At camp we were marched down to the open showers in our Scout swimsuits after we had been there a few days by our Scoutmaster. At that age I had a sort of ...