The spy panties may sound like something out of a bad spy movie, but it's actually as real as they come. You can now track your girlfriend/wife wherever she goes and even know if she's cheating on you, without her knowing about it.

If you're the jealous type, or just paranoid, you can keep track of your woman using the spy panties, a thing - I don't know if I can call it a device, or a gadget - that lets you know where exactly your partner is, all day, everyday.

Moreover, the spy panties can even send you accurate information about her temperature and heart rate, so that you know instantly if and when she's "hotter" than usual, or if the panties are not where they're supposed to be.

The best thing about it is the fact that your partner has no clue that you're on her tail, because the panties use a combination of GPS technology and sensors to transmit data back to a fixed location from most places in the world. This allows the jealous boyfriend/husband to find out where she is in a matter of seconds, using a computer, a cell phone or a PDA.

In case you're wondering why she doesn't realize she's being followed, I'll tell you that the device mounted on the panties is actually quite small and disguised as an innocent pattern on the material, something like a flower or a heart, and doesn't weigh very much.

Again, if you're wondering who the sicko that invented this device is, I'll tell you: the US citizens. How so? Well, this a technology originally developed by the U.S. military through DARPA (Defense Advanced Research Projects Agency), which, you have guessed it, is funded by the taxpayers' money.

Nice, isn't it? As you probably know, DARPA has almost unlimited funds and way too many crazy ideas to spend it on, but this is truly the wackiest so far, even better than the laughing bullets or the Terminator robot look-alike.

For all of you wanting to know more about these special panties, there's a site where they can be purchased, with prices ranging from $99 to $1190, but they don't say how you should convince the girl to actually wear them.

Any ideas?

Some technical specifications right here.