Terry Prone: I thought I was just being quirky but maybe I shouldn't count on it

Arithmomania can be used by sufferers as a way of controlling their lives. Picture: File
Five containers of salt for every 100 weeds plucked. That’s the rule. The salt goes on the weeds, because it’s more environmentally friendly than commercial poisons, even if buying 20 plastic table salt dispensers at a time gets you funny looks at the supermarket checkout.
After those tasks, you get to have a cup of coffee and read 100 pages of a book. It’s all organised and — if you were feeling positive — even quirky.