I may have mentioned this before, but as a young lad, I had a very healthy appetite. Consequently, when deciding on a hobby, I prudently elected to go with “cooking”. My experiments included making fudge and my mother dutifully supplied me with sugar, vanilla and helpful advice. However, we possessed no candy thermometer and, as anyone in the fudge-making business will tell you, getting the temperature right is essential. Too hot and you end up with toffee or hard caramel. Too cold and you end up with a grim sludge, which no degree of refrigeration can render palatable. Making fudge is a delicate operation.