Just because others are reading this question, I am going to answer it. I don't believe you are serious.
Moral Magnets are those persons, places and things, both seen and unseen, both near and far, that influence our thoughts, desires, passions, actions etc., toward the good. Now that is assuming you are using the term moral magnet in the positive sense.
I like a better example taught to me by my grandfather many, many years ago: "If you sleep with dogs, you are going to get up with fleas!" I laughed at first when he said that and then it hit me like thunder telling me that a storm is nearby. Essentially simple; the people you hang with, good or bad, you will pick up their example, values and morality. You cannot help but do this, unless you are Jesus. He was almost always with sinners, but calling them to repentance.
Be careful! Be very careful about those whom you choose to be associated. They will lead you higher to a wonderful life or they will drag you down to both an Hell on earth and in the world to come.