What? "Y-You... You want me to take my shirt off?" For whatever reason, Kotetsu could feel his heart seize for a beat after his partner's question, and he clutched his shirt tightly at the collar like he was scandalized by the very idea. It was probably just from the randomness of the question! Really, it was just so sudden and, uhmm, random that it caught him off guard. That was all!

"Ah, o-okay. Hang on a sec--" Unbuttong the rest of it, the older man tried to think of what reason Barnaby would want to look at his bare chest. He could see the rash on his arms just fine. By the time he got to the last button, he still had no better clue than that, so he sat there awkwardly waiting for Barnaby to do... whatever it was he was going to do.