You all missed the real reason. Holding the hands behind the back allows walking and standing with a slight hunch forward. This relieves the nerve compression of sciatica, a common ailment of older people, especially men. It is possible that many who do this don't even fully recognize why they do it, but just that it makes them feel better.
FLASH Application. Online Application for an Insurance License. The California Department of Insurance (CDI) requires California resident applicants to first pass the qualifying license examination prior to submitting their license application.
Flash Time - The time between paint application and consecutive coats, and/or force dry. Flat - Lacking in gloss. Flatting-The act of using abrasive paper to rub and smooth a panel or painted surface or the addition of a flattening agent to the paint in order to remove the gloss in the finished coat.