Kate Middleton and Princess Charlotte Have "Mastered" the Floss Dance.Kate Middleton, future queen and ... master of the floss dance? According to Prince William, this is a surprisingly true fact.In an interview for the ITV documentary,"Prince William: A Planet for Us All," the Duke of Cambridge was asked about his flossing skills. .In response he said, "No, Charlotte can floss. Catherine can floss, but I can’t.".On a more serious note, William discussed the future of the planet.He highlighted that his children are his motivation to make the world better. .Now I’ve got George, Charlotte, and now Louis in my life, your outlook does change. You want to hand over to the next generation, the wildlife, in a much better condition, Prince William