Since Jon has been observing the large lizard picking up the dropped sticks one by one with its tongue and very patiently add them all to its nest, he has missed part of the display and only turns a bewildered look back to the other man after Tony has finished setting up his pose.

"Wha-?" There is a pause in which Jon just looks at Tony, then shifts a bit how he sits on the desk to face Tony a little better and tilt his head to the side a little as he takes in the way the other man has made himself comfortable. Right. He's playing.

After letting his look of mild disbelief linger on Tony for a moment, Jon resets his expression into a remotely teasing little frown before raising his two wrapped hands into view. "You may have to help me write then, Professor."