There appear to be a few ways to stop your earbuds from dropping to the floor when you unplug them from your waxy canals. One is to just run the cable from the iPhone/iPod in your front pants pocket up through your shirt/t-shirt/muscle-vest and out through the neck hole. Pop out the earbuds and there they dangle. This is so easy and well-known that even clueless teenagers can manage it.
The second method, I have just discovered, is to use the Props from Quirky..