"The point is, you see," said Ford, "that there is no point in driving yourself mad trying to stop yourself going mad. You might just as well give in… - Douglas Adams

A towel, [The Hitchhiker's Guide to the Galaxy] says, is about the most massively useful thing an interstellar hitchhiker can have. Partly it has great practical value. You can wrap it around you for warmth as you bound across the cold moons of Jaglan Beta; you can lie on it on the brilliant marble-sanded beaches of Santraginus V, inhaling the heady sea vapors; you can sleep under it beneath the stars which shine so redly on the desert world of Kakrafoon; use it to sail a miniraft down the slow heavy River Moth; wet it for use in hand-to-hand-combat; wrap it round your head to ward off noxious fumes or avoid the gaze of the Ravenous Bugblatter Beast of Traal (such a mind-boggingly stupid animal, it assumes that if you can't see it, it can't see you); you can wave your towel in emergencies as a distress signal, and of course dry yourself off with it if it still seems to be clean enough.

One of the things Ford Prefect had always found hardest to understand about humans was their habit of continually stating the obvious... At first Ford formed a theory to account for this human behaviour. If human beings don't keep exercising their lips, he thought, their mouths seize up. After a few months' consideration and observation he abandoned this theory in favour of a new one. If they don't keep on excercising their lips, he thought, their brains start working.

If everyone knew exactly what I was going to say, then there would be no point in my saying it, would there?