What causes stretch marks on your boobs?

What causes stretch marks on your boobs?
Stretch marks can occur anywhere on the body. In the chest area (as elsewhere), they are caused by a rapid increase or decrease of weight. The breast area is especially prone to stretch marks because our breasts are not always as supported as they shoudl be. Think of all those times you went without a bra because of a strapless dress or tanktop. This causes sagging, which in turn can cause stretch marks.
I've yet to figure that one out...cocoa butter is one lotion that I've heard "may" do the trick but who knows.
Gaining weight in your boobs and then losing weight, just like after child brith.
Losing and then gaining weight. It only takes a little change, but the bigger the boobs the more effect the weight change will have. Not much you can do about it. Always wear a bra!
It is when your boobs grow faster than the skin and it causes the skin to stretch. Apply vitamin E to your breasts to prevent further stretching. The sad thing is that once you get a stretch mark it's there for life.