[Type R]

Teachers are sent to rural areas, hardship areas. Some are single, others leave families behind where children can go to good schools, or so that Mama can keep her good job/schooling.

Teacher is in a rural area. He doesnt speak the local language. The only available social places are shady bars with local music and women who look either like cheap langas or semi-lunatic drunks. He is too poor to attract the attention of any better-paid women from local parastatals or multinationals (who can afford to travel back to Nairobi every weekend, anyway, so that's not a good anti-loneliness move).

In this context, school girls look like angels.