We, ( I ) are germaphobes so the bed stays really really clean.
We wash our sheets every other week when the maid comes but only because we take showers before bed and in the morning. We never lay in bed in the middle of the day and if we do the bed is made and the sheets don't get touched. Our King size bed is a huge pillow top brand new and encased in a mattress protector and the box springs are also encased in protectors. Then we have a topper we just got which is covered with a mattress pad followed by the sheets, the coverlet and then comforter. Because we are in Texas, GO TEXANS, duvets are super heavy and we haven't wanted to invest in that just yet. I like to sleep with coverlet and comforter because the AC gets kicked down low at night but he only sleeps with top sheet so we are compromising.
Our precious 3 and 5 pound Yorkie puppies are not allowed on top of the bed and if they do because thier daddy wants to play with them its only on the comforter and that gets washed within a day or so professionally at the cleaners.
Our pillows are tempurpedic so they dont get washed ever but they are encased in protectors. Our throw pillows do not get washed because they dont get used. The throw pillows in the livingroom get washed once every other month.Our decor pillows on the bed are all encased in protectors too then covered by their decor sham.