This is a brilliantly simple concept: A mattress with small slits cut into it that will accommodate those awkwardly placed arms, elbows and feet that tend to be a part of human coupling. The sheets would be wicked complicated to change, though.
Editorial note: Whoa! You've found a super-old post here on BuzzFeed, from an earlier era of the site. It doesn't really represent where we are anymore, and may in fact be totally broken, but we're leaving it up as a part of our early history.