In my younger days, "taking the fifth" meant spiriting a bottle of booze out of the old man's cabinet for a weekend party.
This constitutional right now brings to mind someone with something hide. something that they are ashamed of, something that is illegal, unethical and unacceptable.
And I think Henry Payne captured the contemporary view of a person "taking the fifth" in his political cartoon.
Thanks to Henry Payne, Townhall Cartoons, May 26, 2013 for the image