Prince William and Kate Middleton show respect and love for each other during their US trip.

Judi James, a body language specialist, says the couple's arrival poses make a big impression and sell their charisma.

William and Kate look like a happy couple because they wear simple, elegant suits that match.

Their subliminal mirroring rituals and visual symmetry signal a strongly-bonded couple.

There's no need for hand-holding or hugging to communicate their love.

They use eye contact as they walk side by side, which produces the "look of love."

Kate preens her earrings and watches her husband as he talks to their hosts.

William looks proudly and adoringly at his wife while she speaks, with the earring in his eye-line.

Overall, the couple's body language exudes a sense of respect, love, and strong bond.