This is really interesting. What makes the shower tolerable for people? I spend 20-40 minutes just sitting in the shower and thinking so I'm a little confused. If you want something similar to a float tank, I'd recommend taking a shower like you normally do then turning off the lights. I love taking warm showers in pitch black darkness.In July 2014, Science published a study in which volunteers were placed in an unadorned room and asked to entertain themselves with their thoughts for between six and 15 minutes. Participants overwhelmingly abhorred the experience. In one part of the experiment conducted in the subjects’ own home, a third actually found it impossible, and resorted to ‘cheating’, usually via their mobile phones. In another part of the study, 67 per cent of men opted to give themselves an electric shock rather than simply sit with their thoughts. The mind untutored in meditative techniques, concluded the study’s authors, ‘does not like to be alone with itself.'