2. Marriage can increase BMD.
Researchers found that marriage had positive outcomes on BMD (bone mineral density), especially for married men, who exhibited better bone mineral density than men who were widowed, separated, divorced or never married. This is a good thing so that later in life you have a smaller chance of having osteoporosis and the like.
4. Married people tend to be generally happier than non-married people.
Married men are happier than their single friends. In the Journal of Marriage and Family, studies showed that 40% of married people said they were generally happy with their life, while only 25% of single people said they were. Most people in life are on the "pursuit of happiness." Being married could achieve this goal in life.