Showering standing up is OK, I guess, if you're poor. But if you're rich, you should be bathing in a way that reflects how much money you have. Such as with the HydroGlass.
The HydroGlass lets you shower lying down on top of a fish tank. Of course! It features seven shower heads pointing down at you as well as a hand-held shower head for your servant to use. It's all placed on top of a fish tank, just for the hell of it. It won't get you any cleaner, but you'll definitely feel superior to all those suckers standing up in their showers.