Health economists have investigated the personal traits that influence a person's likelihood of entering into a marriage or cohabitating relationship. When it comes to romantic relationships, attributes such as health, kindness, and social status have been shown to be important qualities in choosing a partner. It may be surprising to learn, however, that certain personal traits predispose a person towards either getting married or forming a cohabitating relationship. Scoring high on attractiveness, personality, and grooming is associated with a greater probability of entering into a marital relationship for both men and women, but it does not collectively have a significant influence on entering a romantic cohabitating relationship.

Source: Some characteristics increase the likelihood of getting married and living together