In a member of a family there are called middle child ,( the second in the third, the third in the five, the fourth in the seven... you got it?) . There are also called 'middle child syndrome". You see that sometimes the middle child is the one who is bad in the family. They are sometimes called the 'black sheep' in the family because of what there are doing. So their parent always ask them to be good and be model to their youngest and be polite to the older. But not lot of middle child is brat and bad for the family , sometimes their are the good and wise ones. Their are the good decision maker and the one who able really help the brotherhood in the family. They are understanding because they know how to become "follower" or "leader". And they are the one best member of the siblings in the family.