This is the Backscratcher Pen, an erstwhile regular ballpoint writing instrument that doubles as a tool for rubbing off an itch in difficult places. "Bah," you say, "my pen does that, too, and without any stupid tricks." Well, this one's probably better.
For one, the scratcher part is wide, so it can cover more ground while you dig away for relief. It's certainly an upgrade from the couple centimeters of narrow scratching area you can get from the cap of a regular pen.
The Backscratcher Pen is a telescoping backscratcher and black ink pen, with the body made from brass sporting a shiny chrome finish. As such, it should be just a tad more classy than your plastic Bics and Pilots, so you get both an elegant writing tool and a fancy itch reliever to boot.
It's not too short to reach faraway areas, either, since the stem can extend anywhere from 7 to 21 inches. That means, it won't just be useful for that itch right below your shoulder, the thing should be able to go all the way down to the hidden recesses of your top, too.
Unfortunately, the cap isn't meant to work with other pens the way the More/Real Stylus Cap does. To ensure it stays on tight when you're scratching, you'll need to screw the scratcher-armed cap onto the pen (and spin it the other way to remove, of course). If you don't mind the screw-on action, the Backscratcher Pen sounds like the perfect tool for all your back-scratching needs. It's available for $12.95.