My city is in the middle of the worst drought in recorded history. My showers are typically under 2 minutes and I have to shower with a bucket to catch otherwise wasted water to use to flush the toilet. I also shut the water down when I am wet enough so I can scrub myself without having unneeded water flowing then start it back up to rinse.
Plus, water is damn expensive!
Who here really has the time to stand, think and waste in the shower?
Me, my village gets its water from a spring in the mountains above that provides many times what we consume. Water is just a flatrate utility. The energy to heat it comes exclusively from photovoltaics and solar thermal panels between April and October. Standing under the hot shower is literally free for me in those months.
Rest of the year, eh, okay I either pay for electricity or stuff four more pieces of wood into the stove for half an hour worth of hot shower water, so, basically free as well.