He didn’t have long to dwell on it however. Snape was speaking the moment he was seated, "Your collar, Potter," Harry hesitated, his hands tightening on the arms of his chair, fighting to find an excuse not too. Snape’s stare turned hard, "Have you gone deaf between this morning and now, Potter? If I am to attend to your wound, I require you to unbutton your collar," each word was bitten out as if it physically pained him. Harry released the breath he had been unconsciously holding in a shuddering exhale. He carefully lifted his fingers to his throat, and nervously undid his buttons. Snape had clearly run out of patience however, and the moment Harry’s shirt was undone to his collar bones, Snape removed the binding around his neck with a sharp flick of his wand.