I do, I do, Pick mee. LOL
Back in the day when canon fired round balls, before the cylindrical shells of today. They had to stack the balls next to the canon, but being round how do you keep them from rolling away. This is where the brass monkey comes in. It was formed with depressions for the bottom balls to rest in so they could stack on top in a pyramid fashion. Brass expands and contracts with changes in temperature. If it got cold enough so the story goes it would shrink enough that the balls would roll off. Hence the term, "It's cold enough to freeze the balls off a brass monkey", and you always thought it was something naughty!
LOL
Gabby