[Aidan can't help it, a physical response is occurring. Really, Aidan had been fighting it for his friend's sake for the better part of the conversation, but that was just to much. Still, he decides to let Billy react to it and just continue. Since there is no way the other man wouldn't notice. That said, Aidan wasn't even sure whether Billy would realize what was going on. They were different in other ways after all.]

Indeed. Teaching will be the best part.