Don Firth ===sitting in a doctor's waiting room with nothing to do but leaf absently through the latest "People's Magazine" or a fourteen-year-old copy of "National Geographic," one can gaze off thoughtfully into space while singing any number of songs and ballads silently in one's head===
Slight thread drift which some might however find useful - I find that technique useful in a painful situation, e.g. when a dentist is drilling. Try it & see how it can reduce the pain.

I agree with Genie's point just above — there are times for books & sheets, & times when best not. The important judgment, as so often, is as to which is which. I am often accused of 'pedantry', a charge I do not invariably deny: a trait which often subsumes 'casuistry'; but I think the Casuist school of philosophy has come in for much undeserved obloquy & disapproval ~ their real point surely being that "every case should be judged on its merits" ~ in principle a Good Thing?; even if, pragmatically, there so often is just not time enough.