Because stick field is not a thing? Well, I guess there's gravitational fields, but those are not dipoles and they're really weak. Magnetic fields of large aggr

Because stick field is not a thing? Well, I guess there's gravitational fields, but those are not dipoles and they're really weak. Magnetic fields of large aggregates aren't simple to model, and there are some very complex systems, but individually they are very simple and well modeled.