There's a difference between a mystery and a question. Questions demand answers, but a mystery demands something more valuable-explanation.
Robert CialdiniThere is a study that shows that people who were asked their political opinions, when there was a picture of the American flag in the corner of the questionnaire, reported more favorable attitudes toward Republican Party positions, because the flag is typically associated in people's minds with a Republican belief set. If people vote at a polling place inside a church, they vote more Republican. If they vote at a polling place inside a school, they vote more Democrat.
Robert CialdiniA well-known principle of human behavior says that when we ask someone to do us a favor we will be more successful if we provide a reason. People simply like to have reasons for what they do.
Robert Cialdini