'Marriage' means you weigh more!

Findings from all nine countries showed that couples have a higher body mass index than singles ? whether men or women. The differences between countries were surprisingly small. "Our findings show how social factors can impact health. In this case, that the institution of marriage and certain changes in behaviour within that context are directly related to nutrition and body weight," said Ralph Hertwig, Director of the Center for Adaptive Rationality at the Max Planck Institute for Human Development.