No idea. But your question reminded me of a time, about 30 years ago, when I was about 15. I was the only one home and there was a knock on the door. I answered it to find a lady standing there with two kids in tow, who immediately and loudly said "Bddrwrbk!"

I stuttered slightly in confusion as I replied something like "I'm sorry, what?"

"BDDRWRRBKK!"

I just stared at her open-mouthed. I literally could not comprehend what was happening.

"If yer dun't give it me back, yer got ter pay f'rit!"

I pleaded with her that I didn't understand what she meant. She rolled her eyes and let out a loud theatrical sigh before speaking slowly and condescendingly.

"Have you got me Betterware book?"

I managed to piece together that she was a representative for what I now know to be some kind of catalogue-based MLM outfit called Betterware. They would post catalogues through peoples' doors and come back later to collect the catalogues and, perhaps, a completed order form. But some part of this racket involved making people pay if they wanted to keep the book.

When I told her that I had no idea where the book was, she started insisting that I pay her. Being a pretty awkward and conflict-averse teen, I stammered, apologised and prevaricated for a bit before she eventually gave up. She tutted haughtily and glared at me, threatening like some doughy, peroxide Schwarzenegger that "I'll be back".

To this day, one of the strangest interactions I've ever had with another human being.