Downblouse is a variety of sexual fetishism or voyeurism. It's based on the opportunity, provided by some types of women's clothing, for men to peer down and enjoy watching their breasts unobtrusively. It might take the form of making unauthorised digital photographs down the open top of a female's dress, blouse or other garment. The value of 'downblousing' imagery is increased, from the collector's perspective, when those pictures of breasts or cleavages are obtained thanks to random chance.
For bra fetishists, the reality of naked female breasts can never be as stimulating or significant to them as the way that those breasts can be presented by a brassiere that perfects their shape. A fantasy bust and ideal cleavage is something that exists only in cinema, magazine spreads or photographically enhanced advertising. Bra fetishism relies upon a delicate balance achieved between the amount of breast displayed and the volume hidden by the garment itself. More than any other item of lingerie, the bra is composed of architectural highlights that can be appreciated in isolation or as parts of the satisfying whole. The back-or front-fastening, the cups and whether the material used to make it is sheer, or not, are all vital considerations to the bra fetishist. Most important to the continued fetishistic power of the bra are its straps or lack of. They divide the body of the woman that wears them into pieces that can be appreciated as individual components in the same way that the cups frame and promote the cleavage-itself a phenomenon that doesn't exist beyond the benefits that the bra provides. The position of the straps is also important because if a partially visible one gradually slips down a shoulder in public, without the knowledge of the wearer, it can provide an abiding source of excitement and arousal for the fetishistic gaze.