I live near Cheltenham, home to eight out of 20 original Victorian Penfold pillar boxes still existing in the UK.
I mention this because I've recently discovered that when I take the trouble to write a letter and then stamp the envelope before trudging out of the house to post it, I could have been saving my energy.
It seems that P.G.Wodehouse, of Bertie Wooster and Jeeves fame, never bothered to go out to post his letters but merely tossed them out of the window.
He trusted in his fellow citizens to take them to a post box and do the job for him which inevitably they did.
The Gloucestershire Echo has tried the method out in Cheltenham with great success - 83% of the letters being dutifully posted.
I can only say that it's a good job they didn't try it round here.
My neighbours would have had a field day steaming off the stamps for re-use.