This is the 64th instalment in a series on dementia, including the research into its causes and treatment, advice for carers, and stories of hope.
There are many health benefits to being in a happy marriage. It gives each partner a sense of security and belonging. They have someone to share the burdens of life with and, as they say, a problem shared is a problem halved.
Having somebody to do activities with might mean you get out more, do more exercise or enjoy a better social life.
Marriage can also come with economic benefits, so people may experience fewer financial worries.
There is even research to suggest a link between a lack of close relationships and inflammation, which is implicated in illnesses including cardiovascular disease, cancer and many autoimmune diseases.