I have a friend here in Japan who said exactly the same thing a few months ago! He says that because they are totally flat, with no highlights his brain can’t figure them out. He’s a photographer, so maybe people it bugs people who are especially visually oriented. Will ask him shortly if Mickey’s ears bugged him too…being rounded I think not.
Update: Mickey’s ears don’t bother him. He thinks it’s because they are not pointy and don’t draw attention to which way they are pointing. Definitely the most esoteric conversation either of us will have today. Who’d have thought a tuft of cartoon hair could have such an effect.