The discussion centers on understanding why the magnetic field is perpendicular to the magnetic force, emphasizing that this relationship is a result of the cross product in physics. It highlights that the direction of the magnetic force depends on both the magnetic field and the velocity of the electric charge, with a reversal in velocity leading to a reversal in force direction. The historical context of defining the magnetic field is linked to compass needle orientation, and the behavior of current loops aligns with this definition. Special relativity provides further insight, particularly through a thought experiment involving parallel wires, demonstrating that the magnetic force can be understood without directly referencing magnetic fields. Overall, the conversation illustrates the complex interplay between electric and magnetic fields as perceived from different reference frames.