From a psychological standpoint, why do people love hot tubs? Why is it soothing to rock back and forth on a rocking chair? Why is it comforting to curl up under the covers on a cold winter morning? Why are whale sounds relaxing?
Bits of all these things, on a subconscious level, remind us what it was like to be in our purest state of being — when we were back in the womb, floating in warm goo.
Invent a shower that would be designed to recreate the tranquil sensations of being back in the womb. The shower would aide in bringing your consciousness back to a perfect state of being — giving you the opportunity to relax and be creative while also cleaning your body.