People dancing at Burning Man 2014 (Ѻ), something Paul Dirac couldn't understand the reason of, i.e. the "why' of dancing?
In anecdotes, Dirac dancing anecdote refers the the mid Aug 1929 bemusement of Werner Heisenberg of Paul Dirac's wonderment as to why he was dancing with the flapper girls on the cruse ship they were on, going to Japan; Dirac not understanding why people dance, in short.

In 1929, mid August, Werner Heisenberg and Paul Dirac, after each had given a series of lectures in Robert Oppenheimer’s department at the University of California, Berkeley, set off from San Francisco on a two-week cruise to Japan, during which time Heisenberg was “conventionally hedonistic”, as Graham Farmelo reports, likely partying and dancing with the flapper girls. Heisenberg long remembers Dirac looking on quizzically and asking: [3]

“Why do you dance?”

In 2015, Libb Thims, in his "Zerotheism for Kids" class, employed the Dirac dancing anecdote as a means to teaching "meaning" to kids, in opposition to the the "blind random chance" motto, of the Greek atomic theorist origin, parlayed by many modern day atheists (e.g. Richard Dawkins), in conjunction with Adams creed, on the supposition of waves and tides existing in the universe. [2]

In circa 1845, mathematical physicist and engineer William Rankine penned his "The Mathematician in Love" poem, wherein the fourth section of which he speculates on dancing:

The lady loved dancing: — he therefore applied,
To the polka and waltz, an equation;
But when to rotate on his axis he tried,
His center of gravity swayed to one side,
And he fell, by the earth's gravitation.

(add discussion)

The following are related quotes:

“What good is studying Euclid, if you can’t use it to explain why Elvis played the ukulele?”
Libb Thims (2013), personal note (reminiscent of Dirac dancing anecdote); arisen in respect to pure mathematicians ranking in current smartest person existive genius rankings, Nov 18

“Unbidden and unwarned, nature receives us into the circuits of her dance, drifting onward with us herself, until we grow tired and drop from her arms.”
Johann Goethe (c.1800), an Inderjit Singh favorite quote (Ѻ)

See also
Einstein on love

1. Farmelo, Graham. (2009). The Strangest Man: the Hidden Life of Paul Dirac, Mystic of the Atom (pgs. 163-64). Basic Books.
2. Thims, Libb. (2015). “Zerotheism for Kids” (co-host: Thor) (main), 14-part [4:41-hr] lecture playlist (Ѻ), 5-intro sides (Ѻ), 56-main sides (Ѻ), 11AM-3PM, Chicago, Aug 10 (recorded), Sep 7 (published).

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