Percy nodded at the attempted joke, but was in no mood to laugh - not that he was regularly. Or work, he added to the comment.
He sighed and self-consciously adjusted his shirt, trying to hide the mark again. If only it weren't in such an obvious place - perhaps he would have to start wearing scarves indoors.
"I know," he said with some embarassment. "It's the source of the disagreement, in fact. My brother usually takes pride in claiming his practical jokes, but for some reason is denying this one."