Chuck Swindoll tells about a study of teenagers and peer pressure. The design of the study was simple. They brought groups of ten adolescents into a room for a test. Each group was instructed to raise their hands when the teacher pointed to the longest line on three separate charts. What one person in the groups of ten did not know was that the other nine had been instructed ahead of time to vote not for the longest line, but for the second-longest line.

Do you get the picture? Regardless of the instructions they heard, once they were all together in the group, the nine were not to vote for the longest line, but rather vote for the next to the longest line. This left the tenth student being the only one who would be voting for the longest line. Guess what happened. Time after time, this tenth student would glance around, frown in confusion at the way the others were voting, and slip his hand up with the group. The instructions were repeated and the next card was raised. Each time, the self-conscious stooge would sit there saying a short line is longer than a long line, simply because he lacked the courage to challenge the group. This remarkable conformity occurred in about 75% of the cases, and was true of small children and high-school students as well.

It's hard to say no to the crowd. And becoming an adult doesn't make it much easier. You may know the story of the woman who was interviewed by reporters on her 102nd birthday. When asked what was the best thing about passing the century mark, she answered, "No peer pressure!"