Review (5/5): No More Eyes Popping Out
It's probably happened to just about every busty woman.
You're wearing a top, and are justn't even particularly revealing but it might be a little loose. You bend down, and when you look up you notice somebody's eyes popping out of their head because you've showed more than a little cleavage when you bent down. Especially if you weren't wearing a bra!
This helps not only to keep those situations in check, but it also helps when a button is at the wrong area and creates a gap.
Not just for movie stars wearing super revealing fashions!