While I've heard the married = happier + healthier arguments for some time, are we sure that the cause is marriage, or some other trait heavily correlated with marriage, or that we've not reversed cause and effect?
From what I've read the "married = happier + healthier" thing for men is only true if you put the divorced guys in the "single" column. Which doesn't make sense.
Agreed. Whats the chances that happy, healthy, stable single people are more likely to want to get married, and attract people that would want to marry them?