The future of shower technology! We're still using water but now a shiny metal arm with water proof joints gaurantees that your backside is just as clean as your frontside!
The well placed circles (though some might argue that they are poorly placed ;) are a swipe....homage that I got from the movie Danger Diabolik. There is a shower scene which begins with the lovely Eva carefully protected from indecency by two strategically placed decorative circles. The camera pans over to Diabolik, also showering, with only one privacy circle prudently placed. Such a tease!
Diabolik is played by John Philip Law...who played the near naked angel Pygar in Barbarella! He's in top physical form in both films.
Incidentally, that's Roger Rodgers in the shower with unamed aliens admiring the view.