“So the hours are pretty good then?' he resumed.
The Vogon stared down at him as sluggish thoughts moiled around in the murky depths.
Yeah,' he said, 'but now you come to mention it, most of the actual minutes are pretty lousy.”
Source: The Hitchhiker's Guide to the Galaxy
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Douglas Adams 317
English writer and humorist 1952–2001Related quotes

An explanation of relativity which he gave to his secretary Helen Dukas to convey to non-scientists and reporters, as quoted in Best Quotes of '54, '55, l56 (1957) by James B. Simpson; also in Expandable Quotable Einstein (2005) edited by Alice Calaprice
William Hermanns recorded a series of four conversations he had with Einstein and published them in his book Einstein and the Poet (1983), quoting Einstein saying this variant in a 1948 conversation: "To simplify the concept of relativity, I always use the following example: if you sit with a girl on a garden bench and the moon is shining, then for you the hour will be a minute. However, if you sit on a hot stove, the minute will be an hour." ( p. 87 http://books.google.com/books?id=QXCyjj6T5ZUC&lpg=PP1&pg=PA87#v=onepage&q&f=false)
In the 1985 book Einstein in America, Jamie Sayen wrote "Einstein devised the following explanation for her [Helen Dukas] to give when asked to explain relativity: An hour sitting with a pretty girl on a park bench passes like a minute, but a minute sitting on a hot stove seems like an hour." ( p. 130 http://books.google.com/books?ei=yma3TsDWK8WciQL63smAAQ&ct=book-thumbnail&id=vs3aAAAAMAAJ&dq=sayen+%22einstein+in+america%22&q=pretty+girl#search_anchor)
Attributed in posthumous publications
Variant: When you are courting a nice girl an hour seems like a second. When you sit on a red-hot cinder a second seems like an hour. That's relativity.

“I thought you'd like it," he said, seeming hurt. "You look very pretty.”
Source: Abandon
Nair on studying Narine's doosra, quoted on The Sydney Morning Herald, "Arjun Nair is a name to remember, says Cricket Australia's Greg Chappell" http://www.smh.com.au/sport/cricket/arjun-nair-is-a-name-to-remember-says-cricket-australias-greg-chappell-20160129-gmhk9z.html, January 30, 2016.