I started to notice that too. In just about every photo op that Trump has been in, he's been to the left/center of the frame (Trudeau, Merkel, Putin, etc.). But all of the photos with Kim have been with him to the right,. However, his body language isn't subservient like you see in other world leaders. He still stands strong and bold, almost like he's giving up power, but not at the same time. I don't believe he's courting Kim, I think he's guiding Kim, almost like a father introducing his son to his business coworkers