Look at this photo of First Lady Melania Trump and Prince Harry. Yes, he's very dreamy. But what is going on with the British royal's hand?
Here is the scene from another angle:
Harry met with FLOTUS at the Invictus Games, which started in Toronto on Saturday. (This was also where the prince and girlfriend Meghan Markle made their first public appearance together at an official royal event.) In almost all of their photos together, the prince has his middle and ring fingers slipped into his jacket.
While it's customary for public figures to take photos with each other at these sorts of things, Harry's hand "pose" looks a lot like, among other things, the "hang 10" symbols, horns (which can represent the UT Longhorns and are, ah, the "sign of the devil"), or what someone who's nervous or uncomfortable does when they don't know how else to hold themselves.
As Jezebel reported, it's not as though the photographers happened to catch Harry's hand in the strange position. He held his hand that way for quite a bit—almost like he deliberately wanted all of the photos of him with FLOTUS to have this weird little visual:
Could this have been his sly way of signaling discomfort upon meeting the less tweet-happy Trump? It's unlikely that anyone in the royal family could comment, much less clarify, but feel free to let your imagination fill in the gaps.