If you've ever woken up and wondered whose underwear was whose, or indeed what your own name was, then you need your name sewn into your delicates. You could do that by hand, or buy a high-end sewing machine to help you. Or just build one yourself.
That's what OpenBuilds user sausagePaws did, and build the parts for a mechanical embroidery hoop yourself, complete with Nexus 7 control interface.
Sure, that's a lot of trouble to go to for some underwear, but the results should help deal with any underwear confusion you may be suffering from.
DIY Embroidery Machine Sews Your Name In Your Undies [Hack A Day]