"For all his intricacies, he is a terribly predictable man." Says Thor, God of You Fall For It Every Time. He would wholeheartedly encouraging teasing, if he had any idea it was in the works.

"A brief mention, when the prisoners were taken from the tower. He worried for you, though I'm sure he would not say." So it is clearly Thor's duty to go tell people how Stark really feels about them.