"Yeah, but you're not-" crazy, he finished in his head, but the word went unsaid. He'd needed to ask, needed to be sure that this was real, that yesterday was real too, and not some elaborate head game his mind had concocted out of want. It wouldn't have been the first time, so it was a legitimate concern.
Harry pulled back from the poking slightly, lips quirking into a hesitant smile. "Just checking; gotta be sure. Got a tendency towards seein' stuff that ain't really there, case you haven't noticed." The smile widened at this, self-deprecating but in slightly better spirits as fingers trailed absently over skin as if verifying it for himself.