:.Scarab....You'd like my mother, then. Her cleavage is to her knees these days...that's what gravity does to big breasts.:: ot but... this is a myth. skin stretching causes breasts to sag... some womens skin is more prone to stretching than others. Big breasts will always sag some because of gravity but the degree of sag is genetic and caused by how much the skin stretches. Even small breasts sag, btw.