The world is full of extroverts and introverts. Society needs them. Some must lead and others must follow. This is the normal way of things. Can you imagine if everyone was an extrovert. There would be arguments aplenty. Nothing would be settled. Extroverts need people. While their behavior will to a degree drive others away, extroverts don't like to be alone. Introverts on the other hand like their own company. They can happily work on their own for months. The problem is that these categories are not clear cut. There are some in the middle, those who have characteristics of both groups. The way people behave in their spare time is the best indicator of where they fit. Introverts avoid parties because it is a drain on them. They prefer to go fishing, for example. Extroverts go up the pub to mix with others. Both groups will eventually have to change as their needs are fulfilled. Body and mind tells them to switch off and go the other way. It may be only for a sh...