Some mornings when I am forced to take a shower before we go out; I WISH I was sitting on a Geothermal vent mate! lol I prefer to whip in straight after pumping the water to get the first 'warm' ( so to speak lol) Shower! Toinks!!
When the city buries the water lines here, they are only two or so inches below the surface. The black plastic flexible line runs about 50 or so meters from the feeder line to my house. On a sunny day, the water coming out of the shower in the evening is quite warm, so the kids all rush for it before I get there and then it has chilled rather nicely. Yet, it is still warmer than those eye opening showers of the morning.