I think it has a lot to do with the way the food of the bumper is chamfered while the cheeks are flat, makes it hard to line up visually in your head, that will also cause shadows to make it look off depending on how the sun hits it.
Register a free account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members through your own private inbox!