Think of it like this: You are a square. Your mind is built up of four corners. Every time you blink, your corners switch. They switch because every time you blink, something is different. Whether it’s your favorite food, song, insult, class. It rotates because of change. The world of music and boy bands is always changing, but so is the world as a whole, and so are you. Maybe in a different time, when your corners are full, and the change has overlapped again and again, Zayn will have come back to One Direction.