What should we have done?

We had an overnight field trip to Virginia and all the boys stayed in a cabin along with our teacher. We had spent the whole day outside studying marsh, plants, and differnt organisms. It was about 90 degrees so we went to the showers and came back to the cabin. We didn't know that our teacher showered after us , but we found out we ge came in the cabin in his towel. Everyone went about their buisness all though it was awkward because he was talking to us while we and him also were naked. This went on for about ten minutes. Imagine having a conversation with your naked 8th grade teacher while you were naked. What should we have done if anything? It was extremely gross seeing my 32 science teacher naked.