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.
Oh my gosh, that explains why some dogs put their head to one side when you talk to them. They’re not confused, they’re trying to listen to us better. Awww.
Lupita Nyong’o by Mikael Jansson for Vogue July 2014
"As Lupita gathered those voluminous silk georgette pleats of her custom Prada skirts, she remembers that all she could think was ‘Don’t fall on those stairs’ because, as she drolly explains, ‘it’s not cute if you follow Jennifer Lawrence—it’s not cute if you’re the second one!’"