First off, these people are disgusting and you deserved NONE of it, it is shameful. Second, because it happened to me too and is still going on despite my losing weight-- the breast tissue turns to fat after menopause. There's a name for the process that I have conveniently forgotten because it's awful. But technically the more compact breast glandular tissue that makes breastmilk transforms into ordinary fat, which takes up a larger area. That's the awful reason "why".