Not nearly sensitive enough. Humans often have all kinds of metal in their bodies. Medical pins, shrapnel, fillings, etc. Not an issue. It is a fairly popular

Not nearly sensitive enough. Humans often have all kinds of metal in their bodies. Medical pins, shrapnel, fillings, etc. Not an issue. It is a fairly popular implant. I have personally met multiple other people with them outside my circle of friends with them. It is customary to touch your magnet fingers together to feel the odd tingle.