Fry's play plot
It turns out that Dominic has been taking Cartwright for 'extra Latin periods' in which Dominic engages in sexual liaison with the 13-year-old Cartwright. The headmaster's daughter has seen what has been going on. Dominic admits to this, and says that making love with Cartwright is the only way in which he can feel young.
Brookshaw says that he won't tell anyone about the illicit affair if Dominic sends all of his naughty students to Brookshaw himself, instead of to the headmaster, to be beaten; and secondly, if Dominic will beat him for two days a week.
Exactly the sort of well rounded, neutral individual you want giving your children sex lessons.
In partnership, of course, with a man who advocates sex with a nine-year-old.
Ffs
en.m.wikipedia.org/wiki/Latin!_or_Tobacco_and_Boys