The investigators asked 2000 people about the situation of their dreams. Nearly half of the respondents claimed that they have never had nightmares. From the answers of those who had nightmares, most of the dreamers who dreamed about their teeth or hair falling out are women, and the dreamers who dreamed about falling from an especially high place are also mostly women. Car crashes or plane crashes appeared more in men's dreams. The ratio of men and women who dreamed about being paralyzed or failing exams is close.