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?
I feel for those in arid climates that can wait literally years for rain. Luckily here where we normally get 9 months of rain we are still looking at about 3-4 do there will be no worries about collecting rain water to survive.