body-mod artists and our sense of...magnetism

some wacky body-modification artists decided it'd be cool to put magnets in their ring fingers to sense the world in a new way. the magnets respond to EM fields, oscillate a bit, and activate somatosensory receptors in ways distinct from, say, touching a table or washing your hands. so the implant allows its user to reliably discern electrical activity unavailable to natural human senses. it probably won't go commercial (thanks to infections and uselessness), but you have to admit, it'd be fun being powder for a day.

from the article:
"Huffman and other recipients found they could locate electric stovetops and motors, and pick out live electrical cables. Appliance cords in the United States give off a 60-Hz field, a sensation with which Huffman has become intimately familiar."