Many Americans are so tired and sleepy that they are going without sex, making mistakes at work and having problems in their marriages and relationships. The poll by the National Sleep Foundation discovered that 75 percents of adults have sleep related problems. Most however belienve that they have a sleep problem and ignore it. "Half of the country sleeps pretty well -- the other half has problems," Foundation chief executive Richard Gulula stated. The survey of more than 1,500 adults found 87 percent usually watched TV in the hour before going to bed, 47 percent usually had sex and 64 percent read. Richard Gelula said in the statement. Nearly 25% of those in a relationship said they had sex less often or had lost interest in sex because they are too sleepy. Of those surveyed, 60 percent of drivers admitted to having driven drowsy in the past year and 4 percent said they had an accident or near-accident because they were sleepy while driving. 77 percent complained that their partner has a sleep-related problem, usually snoring. A third of people who described themselves as poor sleepers said their relationships were affected because they are too sleepy, compared to 8 percent of good sleepers