There can sometimes be situations where there are financial disadvantages to being married. Divorce costs can also be huge if you make a mistake and marry the wrong person.
Marriage ceremonies can be very expensive and extremely stressful.
Marriage can extend the time that couples stay together in a bad or unhealthy relationship, when it would be better if they split – for instance, where the couple are clearly ill-suited, or even where there is physical or emotional abuse going on, they may be tempted to stay together because of religious or cultural taboos over breaking up a marriage.