The WunderScrub Bath Belt lets you do the shoeshine thing to your back in the shower, hitting that spot you can never quite reach with your hands.
The $30 silicone object has ribbed handles, a bumpy side and a bristly side.
I laughed when I first saw it, but am now considering that the elderly, people with mobility issues and larger folk might find this handy. And I bet it’d feel great to scratch the untouchable parts of your back in the shower.