I agree with Onwards2wards, particularly the fear of being judged. I think it comes down to the sensation of embarrassment, which is a strong emotion. Even parents use it to discipline children these days. The average person will avoid behavior that will result in embarrassment. Although a therapist, psychologist, (what have you) is there to help you, we realize they are human, too. People suffering with avoidant personality disorder are most likely insecure in some respect and highly sensitive to rejection. Rejection comes in the form of judgement.