Large breasts can be deemed attractive and I'm not saying there's anything wrong with them but from a practical point of view they might as well be as small as possible as they still perform the same job, that's even if they are used for baby feeding and then breasts are only really required until age 40/fertility ends. The smaller breasts the better for moving around (which we do everyday), for sport ie running, physical activity and just going about everyday life, why would someone prefer the extra weight/hassle. For those who want larger why restrict everyday physical freedom just to look large when breasts tend to go out of shape with age anyway.