The reason, it turns out, is a pretty simple one.

It’s not exactly forbidden, it’s just not common practice.

It was a break from previous practice.

William and Catherine on their wedding day

In fact, they did not even hold hands when stepping out of the church as a newlywed couple.

Harry and Meghanhave, however, made several headlines about their public displays of affection since getting married.

William and Catherine’s wedding kiss

Harry and Meghan wedding kiss