Only somewhat related, but wasn't there a DIY biohacking[0] craze a few years ago, with people implanting rare earth magnets into the tips of their pinky fingers, waiting for the nerve endings to heal around the implant, and then supposedly gaining a 'sixth sense' of being able to detect the flow of current via their bionic pinky? Is that still a thing?
[0]: https://www.wired.com/story/diy-biohacking/