I think it depends on what they want from exhibitionism. The adrenaline from exposing themselves, the freedom and liberation on being naked, or the attention from it. On what fokalen is talking about, maybe the mother wants the attention since it will make her feel more attractive and more wanted. Or she could want the freedom and adrenaline to feel young again.
He does have a neat idea though about a CCTV style game set inside a school. It be similar to the USSR style and choose different options. You have a boy side with a male teacher and a girl side with a female teacher, a nurse, either user pick which gender of principal or just an old man, gym couch, and other staff. You have options to switch teachers around, focus more on sex ed, work force, and other subjects. The school could be testing grounds to see what experiments the students and staff will experience.