The secret to a happy life is revealed by Marty (71) of Brisbane, Queensland: "People who live on their own can grow to be selfish and impatient of others, and this can make them moody and unhappy. So people on their own should get a pet, with four legs not with fins, and they will find that through caring for and loving the pet that they will be more tolerant of people, and this will help them to be happy."