I know this is an old thread, but...

I always used to make the bed every day. I used to just use a doona without a flat sheet, so it was very quick and easy to do. But when DH & I moved in together, he insisted that the bed should be aired each day and preferably exposed to sunlight. So, now we fold the flat sheet and doona down to the foot of the bed each morning. It took a lot of getting used to for me as I like a made bed.

We only make the bed if we are expecting a visitor who is likely to go into that room (otherwise the door is kept shut, so they're not going to see it).