At least one study suggests that 10 percent of communication between spouses is deceptive. Another has found that 38 percent of encounters among college students contain lies. However, researchers have discovered that even liars rate their deceptive interactions as less pleasant than truthful ones. This is not terribly surprising: We know that trust is deeply rewarding and that deception and suspicion are two sides of the same coin. Research suggests that all forms of lying — including white lies meant to spare the feelings of others — are associated with poorer-quality relationships.