Being sexually satisfied can be a priority for many adults. In fact, the decision of whether to cohabitate or marry may be a stressor if sex becomes less satisfying for a couple, depending on which they choose.Professor Larry Gibbs, a postdoctoral research associate in the sociology department at the University of Nebraska-Lincoln, became interested in the topic of sexual satisfaction among heterosexual couples who are married versus those who simply cohabitate. He said this emanated from a broader discussion on relationship quality and stability.