  I derive an exact, static, axially symmetric solution of the Einstein-Maxwell
equations representing two massless magnetic dipoles, and compare it with the
corresponding solution of Einstein's equations for two massless spinning
particles (see gr-qc/0201094). I then obtain an exact stationary solution of
the Einstein-Maxwell equations representing two massless spinning magnets in
balance. The conclusion is that the spin-spin force is analogous to the force
between two magnetic dipoles, but of opposite sign, and that the latter agrees
with the classical value in the first approximation.
