I was talking about how amazingly cool the idea of a direct electromagnetic sense is with an old buddy of mine yesterday morning, and he pointed me to a site called Amazing Magnets. Amazing Magnets sells tiny NdFeB magnets that you can buy in lots of 100 for $5.
Now, these magnets can't be implanted without Very Bad Things happening. However, my friend had a brilliant flash of insight: perhaps something like a cruder version of the magnetic sense could be had by taking these magnets and embedding them in a second skin of liquid latex.
And, of course, that started my thought process down the road to perversion.
Leaving aside the idea of a new sense for a moment, it seems like it might be fun to place magnets all along someone's back, or chest, or thighs, or breasts, then cover that person in liquid latex and have some fun. A degausser or a bulk tape eraser passed a few inches over the subject's body might produce some very...interesting sensations. Especially for a person who is blindfolded, bound, or both.
And S has some liquid latex.
I think I'm going to buy a bunch of these magnets.