http://finance.yahoo.com/news/sex-or-sleep-.html?page=1

Something surprising is going on in the American bedroom. In droves, people are outfitting their beds with a plush, squishy, and decidedly controversial type of mattress. While these products support the body just-so during sleep, they distress some people during sex. The complaint is lack of “traction,” if you get the drift. “It’s like trying to do it in quicksand,” one owner writes on an Internet message board.