There’s a reference to the fleur-de-lis in Alexandre Dumas’ The Three Musketeers as an old custom of branding criminals with the symbol. My crime? I cheated on my last girlfriend. The fleur-de-lis is also used to to indicate north on the compass rose. The Boy Scouts adopted the symbol because it “points in the right direction (and upwards) turning neither to the right nor left, since these lead backward again.” On the ring finger, the two meanings combine to be a reminder to never cheat again.
Screw wedding bands. <__>