In an article found on scienceofrelationships.com shows some research that men actually get better after marriage, more so than women. Since women tend to take care of their husband this may cause them to live longer than single men. Also since women monitor their husband’s alcohol intake he will likely drink less. On the contrary, married women tend to drink more alcohol.
An interesting read check in full here:
For Better or Worse…In Marriage, Men May Get More of the Better