[breakem]

my guess is you wear it when you will not be wearing a blouse or bra. Probably doesn't include trips thru the airport or other metal detectors.

[KQQL]

http://drudgereport.com/jjt.jpg (Alert: Link is to R pic )
Superbowl goes topless

[bobwoodard]

my guess is you wear it when you will not be wearing a blouse or bra

True, after all, it'd be unseemly to be seen topless in public. :-)