I know this question has been beaten to death, but I haven't seen a response that clearly (to me) answers the following: 1. Magnetic fields *can do work* on intrinsic dipoles, right? (e.g. two electrons can do work on one another via their intrinsic spin). 2. Magnetic materials can do work on one anther, right? "Bound currents", in this case, are fictitious--it is the intrinsic moments of the electrons that provide the magnetization, and there is no reason to believe they cannot do work, right? Thanks!