When I was growing up and my parents and I would take a trip, I use to identify cars and trucks as they were traveling towards us on the highway. They were amazed how I could do it at such a young age. To me the grilles on the cars and trucks made faces and that's the way I would know what they were. Some had a grin, some didn't. And some had teeth showing like this truck. I stopped seeing these faces long ago so I don't think it did long term damage.