[#nailedit. Though he does react as expected, unwittingly offering up some mild entertainment for the other male. The dismissive gesture just makes him want to walk over there, and jerk the idiot into redirecting that attention where it belongs. He does not however.]

I'm supposed to be the one obsessing but you're the one that keeps bringing up the cards specifically. [Come on Kaiba, you can't really deny that your are in fact fixated on your beloved cards. The cards that were the impetus for encouraging you to survive your ill-treatment and ultimately overcome your oppressor.]

[So by more actively engaging, he was doing it wrong? Oh well, he would come out stronger for it. It's not about who did it first, but who did it best.]

A decent coach is capable of both instruction and some level of competency in the subject thereof, otherwise you might as well be just reading out of a manual.

[Not that he's suggesting that every move could or should be executed by both trainer and monster but this was just running and agility, it wouldn't kill Blue to stop standing there like a pole once and a while and join in]

It encourages respect between creature and instructor.