There is no good explanation why scientists can’t figure this out. They have a huge sample size. They have millennia of longitudinal data. We’re pretty sure they haven’t settled this one because it keeps people asking the question and paying out those research dollars to solve it. For those who want to keep the discussion going around tonight’s dinner table, two new studies. The first is reported by MSNBC: Single People May Die Younger, New Study Finds. The second suggests that familiarity breeds contempt and contagion: if your spouse is a big-time corn doodle eater, you at risk of picking up that habit. And it’s hard to stay sober hanging around with a drunk: Long-Term, Intimate Partnerships Can Promote Unhealthy Habits.