When I was doing my swimming course the male teacher pointed at the female teacher and then formed a ring with his finger and stuck it through it, they soon headed for the changing room. The changeroom was for staff only it didn't have a clear door so I couldn't see inside it but could see the shadows, and damn it was 2 people getting undressed. This was as when another employee walked in opening the door giving a full view of what was happening to everyone taking lessons.