In the ‘50s, it was important to always have two cents on hand in case you needed to make an emergency call on public phone lines. Scared that this money would fall out of their pockets, people started to store their coins in the weejuns of their loafers: later known as the penny slot. To this day, the phenomenon has continued – albeit less as a necessity and more as a fashion statement. These shoes by Christian Louboutin see the detail sitting front and centre atop classic leather.