A Design Mystery: Why Does the Classic French Workwear Jacket Have No Right Breast Pocket?

Designers should be able to look at existing objects and reverse-engineer why they were designed that way. So let's do an exercise, and try to figure out why the classic French workwear shirt/jacket, the bleu de travail that has now become a knocked-off streetwear staple, has no right outside breast pocket. I believe I've worked it out, but I want to see what you deduce. First we'll need some background info. The bleu de travail (work blues) first appeared in the late 1800s, as...