@Lucy
You could also do back to front, and inside out, back to front thus making four days' wear in total.

Of course, not wearing any at all negates the requirement to wash them. It's all a compromise between decency, comfort and required work.

Edit - One day a couple of weeks back I went for a pee and was having trouble finding the access port in the front of my boxers. Mainly because it was at the back, as I'd put them on the wrong way round after swimming.
( K2k6 has a proper job these days, Thu 31 Jul 2008, 16:01, Reply)