It is all in your head: what you prefer to see and what you prefer not to see. It is just like when you open the fridge and have decided to take the chocolate. Most of the time, you will take the chocolate and nothing else. Also, you do not see anything else. Well, you see them but do not take note of them. If someone were to ask you whether there are any oranges in the fridge, you probably wouldn’t know. So it is a choice on whether to see or not to see.