Showers are not only the best place to get clean, they also tend to be the best place to have creative moments or epiphanies.
Everyone knows what I am talking about. Shower time tends to be creative time for most people and now scientists know why. It all has to do with what we are doing and how the brain is responding. And, all the while being electrically grounded to the Earth via the conductive nature of water and metal pipes.
Taking a shower is an easy task that is done daily. Thus, we don't need to focus on it. "Research shows you’re more likely to have a creative epiphany when you’re doing something monotonous, like fishing, exercising, or showering. Since these routines don’t require much thought, you flip to autopilot. This frees up your unconscious to work on something else. Your mind goes wandering, leaving your brain to quietly play a no-holds-barred game of free association." (Mental Floss)
This process of non-focus allows the brain to go into a brainstorming daydreaming state. This frees up the brain to be creative and think about new pathways to discover.
"This kind of daydreaming relaxes the prefrontal cortex—the brain’s command center for decisions, goals, and behavior. It also switches on the rest of your brain’s “default mode network” (DMN) clearing the pathways that connect different regions of your noggin. With your cortex loosened up and your DMN switched on, you can make new, creative connections that your conscious mind would have dismissed." (Mental Floss)
This "default mode network" is perfect for subconsciously making discoveries, or creating new ideas that were already stored in the brain but pushed aside for the efficiency of focusing on a single task like work or helping a child with their homework.
"Thinking hard about a problem deactivates your default network. It boosts your prefrontal cortex’s control. This isn’t a bad thing—it tightens your focus and gives you the power to stop gawking at cat pictures and hit that deadline. But it can also dig you into a creative rut. Because when you’re deeply focused on a task, your brain is more likely to censor unconventional—and creative—solutions." (Mental Floss)
Basically, it is near impossible to think creatively when one is facing a deadline or too focused on a task. Thus, when the brain finally gets a change to shut down in the shower or on a walk, it instead looks at everything it learned that day in a new creative light.