James Whatling / MEGA TheMegaAgency.com Prince William and Kate Middleton appeared in sync while greeting German President Frank-Walter Steinmeier. "In the stills photos we can see two very strong 'tells' from William and Catherine to illustrate the strength of their amusement and good humor," body language expert Judi James told Daily Express. "Catherine's smile entails dimples plus a tongue that has appeared between her teeth to the side of her mouth, which hints at high levels of inner fun.