It just doesn’t have the same ring to it does it? While 50 Shades of Grey was a hands down best seller yellow isn’t exciting or enticing, its just dingy. No one sets out to have a lackluster smile, life just happens, one cup of coffee, one cigarette, one soda at a time. Everything we eat or drink can cause staining of our enamel. This makes teeth less bright and can even tint them brown or yellow.