The term long handles was used in the south and west, but the exact reason it was used is unknown. It could be because the arms and legs of the one piece garmet looked like handles or another reason.
The answer is long underwear.
Long underwear is "långkalsonger", in Swedish.
sizing handles
Spanx underwear targets the waist line and love handles producing a slimming effect for wearers. They are often calls shapers or slimmers.
Sword handles are called hilts. See the link.
Long handles came into being to help with handicapped people. The long handles are now a requirement on any new doors in commercial buildings.
Sizing Handles
They are called ANSA
Sizing handles
Sizing handles
longjohns are long underwear, therefore no, wear them on their own.
Old-fashioned underwear (called long johns) used to have an actual flap in the back that covered up the butt - or that could be unfastened and let down so that you could use the outhouse (they didn't have indoor plumbing back then either).