Why Did Jesus Need to Be Baptized?

In 2 Nephi chapter 31, Nephi picks up this theme: Why did Jesus need to be baptized? Because he had never done anything wrong, it is to fulfill all righteousness. Matthew's first recorded statement was when he was 12 in the temple. He said Wisty not that I be about my father's business. His second recorded statement is, suffer it to be so now for thus it become with us to fulfill allrighteousness.