In the current Issue of Reader's Digest, they did a review of Gizmo's sold on TV.
One of these gizmo's was the "Natural Bra" which is supposed to enhance cleavage.
However, they give this gizmo the lowest rating of all and call it a "total bust". In other words its does not fulfill its promises.
The Bad News:
Readers Digest makes no comment about the (lack of) necessity for such a device.