On a related note, I wonder if people around the world are familiar with electric showers. Essentially, it's a resistance similar to the one found in a toaster, placed right inside the showerhead. It heats the water as it flows through. People hearing about it for the first time are usually shocked that we don't die from electrecution.
For those who don't know, the sinks and bathtubs in UK homes and businesses often have two completely separate taps: one for hot, one for cold. You're supposed to fill the sink with water from both and "wash" your hands (or your dishes) in it. No, you don't rinse them afterwards. It's just soap, it's good for you.