Sometimes a sychological weakness can hurt others. I am currently writing a story where one of the characters has a psychological weakness that has caused him to hurt others in the past. There's nothing wrong with him morally, which is why he isolated himself in order to keep from hurting anyone else. His want. His Need however, is friendship.
Discussing different views of morals is critical in the 21st century classroom. It is important to encourage questioning, and with discussing the meaning of morality, and what society views as moral and immoral, students learn more about where they sit on each debate.