Kate Middleton and Prince William show 'who they are behind closed doors' with BAFTAs 'love tap': expert

foxnews.com:

Royals rarely show public displays of affection, but Kate Middleton disregarded protocol Sunday with a subtle, yet sweet gesture toward her husband, Prince William.

The Princess of Wales gave Prince William a quick pat on his behind as they walked the red carpet at the British Academy of Film and Television Arts awards, a move that "seemed really natural" for the couple, one expert says.

Human behavior expert Susan Constantine told Fox News Digital Kate and William looked "extremely happy" at the ceremony in London. "I think it's who they are behind closed doors," Constantine said. "I'm kind of glad to see them kind of opening up and being a little freer and showing that kind of affection." Vogue initially shared a short clip of the "love tap" on Instagram and wrote the "royals really are just like us — a regular husband and wife that sometimes like to cop a feel." "I think what happened is that the two of them — behind the cameras and by themselves — this is what they do all the time," Constantine said. "I think she got caught up in the moment, and it was just an instantaneous reaction to pat him on the rear. "There wasn't any sort of performance.They weren't doing it to play up to the audience.They really were having a moment between the two of them.

And, yes, there was lots of stuff that was going on around it, but they were so comfortable in that environment, and it didn't prohibit the intimacy that the two of them had. "That's a good thing, because I see things differently with Harry and his wife," she noted. "There's a lot of performance stuff going on there.