Many people carry a disproportionate amount of fat in their necks, so that they look like they are more overweight than they really are. There are even some thin people with pronounced double chins. As the fat under the chin builds, it can obscure the lower border of the jaw, so that the natural border between the face and neck gets lost. It is very important for there to be a visual distinction between neck and face, and submental liposuction helps to restore that border. Whether in men or women, our beauty, weight, fitness, and energy level are perceived to a great degree by the shape of the neck, which is why submental liposuction is so commonly done.