You have a new name, and when you get married you get another new name. If you get any office, you also get another new name. Then at your funeral you get another identity, etc. They go through the same ritual every time. In the Christian churches it's when you are confirmed, around the age of fifteen.
Boys are no longer with the women, etc.
They now belong to a man's phratry. These are the rites of puberty. So each time you get a new name, a new identity, a new appearance, new marks, and a new title or degree. You are this day reborn. Remember, he gave them a new name.