On: Why Your Best Thinking Is in the Shower (2014)

[bsaul]

or you do it like in japan : they have a bathtube filled with water that you reheat when you want to have a bath, but you actually clean yourself before going inside.

[brianwawok → bsaul]

That's a hot tub in the US... Which generally stay hot all the time and cost about $30 a month in energy costs.