Sex in the news

News item:

"A teacher who lay on top of a pupil and exposed his genitals to his class has been struck off the teachers' register. [...] A pupil complained that the teacher pulled her between his legs, jumped on her and tried to kiss her, touched her bottom and exposed his genitals. It was also alleged that he lay on top of a pupil "when there was no proper reason to do so" and that he slept in class and beside the school swimming pool while pupils were in it."

Homework assignment: 200 word essay on "when there is a proper reason for a teacher to lay on top of a pupil".