I recall that my mother used to iron everything! I managed to dissuade her from ironing
bath and tea towels by explaining that ironing flat their fluffiness (hey! fluffiness!
that's a nice word) caused a diminution of capillary action and therefore ironed towels
had a reduced capacity to soak up water.
I used a somewhat similar argument to stop her ironing bed linen, explaining that air is a very
efficient insulator against loss or heat and that when she ironed the air out of the fluffiness
(there's that word again) meant that the bed remained colder for longer. I have to say, though,
that my REAL reason for getting her to stop ironing was that in wintertime I hated jumping into
ironed jocks that were ice-cold because her ironing had de-aerated their fluffiness!