7. Born this way
Hans Eysenck, a German-born English psychologist, defined introverts by their baseline arousal. It was apparent that introverts have high baseline arousal and need little social interaction to reach satisfaction. Moreover, brain scans showed a thicker prefrontal cortex in introverts compared to extroverts, which is associated with deeper thoughts and planning. This goes to show that being an introvert cannot be helped. What can I say? They were born this way.