For some reason Lady Sybil, keen of eye in every other respect, persisted in thinking of Corporal Nobbs as a cheeky, lovable rascal. It had always puzzled Sam Vimes. It must be the attraction of opposites.
The Ramkins were more highly bred than a hilltop bakery, whereas Corporal Nobbs had been disqualified from the human race for shoving.
By Terry Pratchett, “Men at Arms” (via twin-city-ankh-and-morpork)
He’s not expressing confusion, he’s tilting his head for better sound localization. While having an ear on each side of the head is good for lateral echolocation, tilting the head so that the ears are offset gives it vertical depth.