WHY A TOWEL? Well ...
"... a towel ... is about the most massively useful thing an interstellar hitch-hiker 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 vapours; you can sleep under it beneath the stars which shine so redly on the desert world of Kakrafoon; use it to sail a mini-raft 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-bogglingly stupid animal, it assumes that if you can't see it, it can't see you — daft as a brush, but very very ravenous); 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."
The Hitchhiker's Guide To The Galaxy
SO. In honor of towel day I am going to carry one around with me all day and see who asks why I am carrying it. When they do (and some will), instead of going into afore-quoted Adams passage, I plan to nod and say one of these brief responses, whether they make sense to the situation or not:
"Mostly harmless." OR
"So long and thanks for all the fish." OR
"Time is an allusion; lunchtime doubly so." OR ...
"So long and thanks for all the fish." OR
"Time is an allusion; lunchtime doubly so." OR ...
...my favourite ... I will simply nod and say, "42."