Meet the Trunchbulls.

↓ Transcript
When I worked at a cable company tech support center, I had a customer once who, when I called him Mister Jones (not his real name, don't even remember the real name) he got severely indignant and demanded I call him Doctor Jones. It always struck me as a really egotistical and conceited thing to do to a complete stranger. That experience is a small part of where Professor Trunchbull comes from.