Well, to find the answer, you’ll have to browse the pages of these two ‘Friends of Moor Allerton’ magazines produced in 1981 and 1982 respectively.
Collating together news of the school, reports and accounts of events, original writing, poetry and crossword puzzles, they also contain ‘The Legendary Moor Allerton Jokes Page’ wherein you’ll find the rib-tickling answer to the question posed in the title of this post.
School-boy humour indeed!