If I ever become wealthy, I will buy a bidet with warm water, and make my residence have the piping for it. Switching to a cold-water bidet saved me a ton of TP. Alas, it would take $19,000+ for my current house to have 60-year old piping replaced to accommodate instant hot water.
My house takes at least 5 minutes for the shower to get warm. I am wasting a ton of water, but the alternative is hypothermia.








I suspect things look like this: