Guess what! Antisocial men are less likely to get married when compared to less antisocial men. Why was this hypothesis so striking, had nobody asked women whether they would prefer a more or a less antisocial partner? Anyway, this was a nicely done twin study, and it showed that antisocial behaviours are also reduced by marriage – with a positive correlation between quality of marriage and size of antisocial behaviour reduction. Interesting? Rocket science? You decide.

An Examination of Selection vs Causation via a Longitudinal Twin Design S. Alexandra Burt, PhD; M. Brent Donnellan, PhD; Mikhila N. Humbad, MA; Brian M. Hicks, PhD; Matt McGue, PhD; William G. Iacono, PhD. Does Marriage Inhibit Antisocial Behavior? Arch Gen Psychiatry, 2010;67(12):1309-1315