Social exchange theory proposes that individuals form relationships by weighing rewards against costs. Rewards may include companionship, sex, or care from a partner. Costs could be things like time, effort, or finances required for the relationship. According to the theory, people will commit to relationships where the rewards outweigh the costs, making the outcome profitable. The comparison level, based on past relationship experiences and expectations, represents the standard against which individuals judge current relationships. If a potential new relationship seems more rewarding than the comparison level, the individual may choose to form that relationship instead of remaining in their current one.