Shyness or social anxiety is caused by a whole host of biological, environmental, and cognitive factors. Researchers are pretty sure that no one is born shy; there isn’t a “shy gene” so to speak. With that said, biology can make a person predisposed to becoming shy or socially anxious later in life unless one’s childhood circumstances and upbringing push them in a less timid direction.

via Help for the Shy Guy — Step 1: Understand the Nature of Your Shyness | The Art of Manliness.