For many people, Valentine's Day is a time for candy, flowers and for couples to reflect on their relationships. But it takes more than candy and flowers to make a relationship work, according to Cindy White, an associate professor in the University of Colorado at Boulder's communication department. The key to a good relationship, said White, is communication. "When we talk about communication problems in intimate relationships lots of times what we are talking about are tensions that people are feeling," said White.