hi5! :D

A week or two. Turn on a microwave--that should do it. Or go into a bookstore--you'll feel the scanners at the door.

I live in NYC, where there are all kinds of things hidden behind walls and under the sidewalk. Maybe you're just in an area deficient in weirdness?

Ayup. My superpower might not be anything to write home about, but it's what I've got!

See other posts I've made here. I went to a body modification guy who does these, it was a quick procedure, basically healed in a week. Once the swelling went down, I was able to feel more stuff. The things I feel most often are electric ranges, microwaves, security scanners at stores, and wall warts.

Because it was there:Mountains::Because it was awesome:Subdermal mangets

I like having senses other people don't. It doesn't give me any practical advantage, but it's neat.

Speaking as a guy with magnets in his fingertips, you're wrong. They're nowhere near strong enough to cause trouble.

Only if the fields are changing. RTFMAXWELLEQUATIONS.

Subdermal magnets are pretty weak compared to the magnets you'd find in, e.g., a hard disk head. Speaking from experience, they certainly aren't strong to wipe a credit card, so I double they'd be a threat to any practical device.

The magnets that they use are coated pretty well. Mine are actually flat little magnets that are used in magnetic stirrers in chemistry labs. They're made to be as inert as possible.

In the first generation, the guy who did them coated them with silicone that would rub off. It would cause the skin around the magnet to blacken once that happened. Once I found out that they fixed that problem, I jumped on it.

Of course, if I ever need an MRI, I'll need them taken out.

It's pretty sweet. I've got one in my right thumb and index finger. I feel a buzz whenever there's a strong enough alternating field nearby, and a tug whenever I pass my hand near strong static magnets. I'll be walking down the street and feel sensors to detect the presence of cars, and I can feel the brakes in subway cars. Nothing particularly practical, but I figure I may get a couple of seconds warning before the shockwave if I ever feel an EMP.

In terms of strength, I can basically pick up staples. Anything heavier falls off. Other magnets I can drag around on the table pretty easily, though it's uncomfortable to have them actually contact my fingers.