What is pretty and desirable is a subjective thing. Experiencing beauty is one of those things that is very hard to link to objective, physical appearances or qualities, although some guidelines will always exist. In the case of teeth, most patients simply say they “just want a pretty smile”. Yes, but what if after having your teeth aligned, or whitened, or are getting a complete smile makeover, you realize that the things that you asked for did not get rid of the annoying quality, shape size, etc of your teeth? Or what if you and your dentist have a fundamental philosophical disagreement about the nature of beauty, which becomes apparent once the procedures are done and you are not happy with them?