I thought about this its not the size of breasts its the strength of the individual good posture and health and good bra can enable women to carry a lot more up top I know women with very big natural and fake my cousin is 34h silicon and I have a friend who is natural 32jj neither of them complain of back pain both slim healthy women although I then a few plus size ladies complain at only a d cup so maybe because breasts saggier if more fat than other breast tissue so breast won't support itself and cause slouch and so strain on the back and their body is weighing more all over or less muscle fat ratio or maybe because I don't know I personally think women can be very fit and strong so could carry a big chest easily if they work out.
My goal would be for very large breasts a jj would be my dream pair
My goal would be for very large breasts a jj would be my dream pair