Final answer:
Couples who wait to have sex in a dating relationship are more likely to experience better relationship outcomes, reflecting traditional values and the desire for a monogamous partnership that persists despite evolving societal attitudes on sex and relationships.
Step-by-step explanation:
The question asks about the outcomes of couples who delay sexual activity in their dating relationships. Based on the information provided and recent research, couples who wait to have sex are more likely to experience better relationship outcomes. Premarital cohabitation is mentioned as having little effect on the success of marriage, and studies suggest that values and beliefs regarding sexual attitudes continue to evolve. It is evident from the data that although society's views on sex and relationships may be changing, there is still a desire among many for monogamous relationships and traditional values. Additionally, the fact that married couples engage in sex more frequently than singles and the increase in median age for marriage suggest that relationship dynamics and decisions concerning sexual activity may be linked with broader life plans and goals.