Etiquette experts in the UK are in a redfaced tizzy Tuesday morning after the Duke and Duchess of Cambridge attended an NBA basketball game last night (Cavs vs. Nets in Brooklyn) and LeBron James broached royal etiquette by putting his arm around Kate Middleton in a post-game photo op."Although I am sure the Duchess of Cambridge won’t have worried about it, Mr James should not have put his arm around her," royal etiquette expert William Hanson told theAmericans are much more tactile than we Brits and this is another example of an American being too touchy feely with British royalty. You’d have think they’d have learned by now."Hanson echoed the sentiments of many Brits when he said, furthermore, that LeBron's decision to appear in a "sweaty top" was bad form."A shower would have been preferable but he had just finished a game – so even more reason for him not have opened his pits by lifting his arm and placing it around Her Royal Highness!'Earlier in the game, Prince William and Kate met Jay-Z and Beyonce and shook hands while theMagazine photographers all pooped their pants and jotted down "Holding Court" puns en masse.The duke and duchess attended the game, viato mark a new partnership between their royal foundation and the NBA. Looks like they'll be working with (or at least funding) United For Wildlife and the Coach Core program, which aims to encourage a new generation of sports coaches.