Responses
Hmm maybe for me I took that as him trying to give him clues as to who he was. He was always trying to give him hints but he never caught on. But your theory is a good one to.
Omggg that's so good!! You're right!
I just realized that doc kinda had a fantasy to do the whole teacher student thing in his office when he realized who hyuk actually was and then did the whole math quiz and spanking, all because he used to be hulk's tutor