shave the body in the bath after a good soak.
new double blade razor Gillette G2 for preference, splash water on area, rub soap on, 2/3 back and forth strokes with razor, rinse razor, splash water on, resoap, rinse etc.
have long handled mirror to check back and shoulders are done.
should take 3 minutes or so.
stand up and use shower to get clean or pour clean water from a plastic jug.
CLEAN THE BATH!