About 5000 years ago humans never knew about bathrooms. They had houses and they knew the importance and comfort of a roof above them, but they never knew bathrooms. They all lived closed to rivers, and bathing, though we don’t know how often they did bathe, they used to do that in the river. And about 150 years ago when the electric motor was invented, so were the over head tanks, which delivers water to all taps in a home, and this way we no longer need to live close to a river.
Bathrooms built in houses these days are really symbols of how far humans have moved from bathing in a river and drinking the water where fish and bacteria unknown live in. Certainly bathrooms fitted with Grohe faucet show how far ahead humans have come, and how different we are to the other living beings on this planet.