When you’re 11 years old, you move to secondary school and decide who you want to be for the next few years.
When you’re sixteen, you begin to deal with the pressures of adult society and learn about people in a way you didn’t know before.
When you’re eighteen, you decide on a university or a job. In other words the conveyor belt, or the other conveyer belt.
And when you’re 21, you have to decide on what’s next.