Prince William refuses to quit hobby that terrifies Kate Middleton: experts

Kate Middleton’s inability to get Prince William to give up riding motorcycles despite her efforts is "something most married couples can definitely relate to," Christopher Andersen, author of "Kate!," told Fox News Digital.

"Kate's inability to get her husband to give up an activity he loves is something most married couples can definitely relate to—whether it's smoking, drinking, skydiving, whatever," Andersen said. " On the other hand, William's situation is unique. He is a future head of state.