Bulletin Today | Home & Family | Personal HealthWhich is more important to you, sleep or sex? That seems to be the choice if you’re considering (or have bought) one of those cushy, squishy, memory foam mattresses that have become wildly popular in the past eight years. A lengthy story in Barron’s finds that while the mattresses are good at supporting the body during sleep, they’re not so supportive of our sex lives. People commenting on Internet message boards complain about “lack of traction.” One mattress owner wrote, ”It’s …