Mark, you have wisely identified a place where many persons experience tranquility - in a hot tub after a tiring day of work or stress. However, the focus of the Rhyku was that equanimity or tranquility and a medititative bliss is not based on the physical state of being but on the mental state of mind - this can be achieved even in places where others may identify as places of stress. For example, in one of my work environments, the powers that be had decided to set up a room for stress relief with a comfortable padded recliner and a choice of mood music that all employees could avail for 15 minutes during the working day. I never made use of it and when I was asked why I did not use the meditation room, I responded that I could achieve a state of calm just by closing my eyes for a few minutes in my own cubicle and the fact that I enjoyed my work and did not see it a source of stress. So that was the basis for this Rhyku.