The nipple is usually positioned on the body surface between the 4th and 5th ribs, but this body surface positioning is usually used for men or women with small breasts. In women with large breasts, the breasts may be sagging and the positioning may not be accurate, and may be flat between the 5th or 6th rib. In addition, in the case of older women, the breasts are completely loose, sagging very much, and the positioning is seriously inaccurate. It is possible that the nipples of older women usually sag to the 9th-10th intercostal space, so generally if the nipples are used to position the breasts, it is usually in the case of men or women with smaller breasts.