My wife uses up an AMAZING amount of toilet paper to dry her Bush after urinating. I told her to put that toilet paper into the trash. She uses at least a roll each week for that alone. There are a lot of people using wash cloths instead of toilet paper, and then they get cleaned in the washing machine.
All kinds of things can be done to reduce water usage.
I also installed a lint filter on the washing machine.
We also do not flush if it is yellow.
"Yellow is Mellow. If It's Brown, then flush it down."
This rule alone saves 80+ gallons a day. Some people compost all of their urine. Do you have a garden?