Have you ever felt like your friends were more popular than you? You may have been onto something. In 1991, the sociologist Scott Feld compared two numbers: how many friends a participant had and the average number of friends that these friends had. He found that people almost always had fewer friends than their friends did. The reason: friends aren't distributed equally. People with few friends are less likely to be in your circles while people with many friends are more likely to be in your circles. The result? Your friends are, on average, have more friends than you do. He published his findings in the American Journal of Sociology.
Researchers have since observed the so-called friendship paradox in a wide variety of situations. On Facebook, your friends will have more friends than you have. On Twitter, your followers will have more followers than you do. And in real life, your sexual partners will have had more partners than you've had. At least, on average.MIT Technology Review
Interestingly, studies show that many people seem to think that they have more friends than their friends do.