2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/195149I show that reflection positivity implies that the force between any mirror pair of charge-conjugate probes of the quantum vacuum is attractive. This generalizes a recent theorem of Kenneth and Klich to interacting quantum fields, to arbitrary semiclassical bodies, and to quantized probes with non-overlapping wavefunctions. I also prove that the torques on charge-conjugate probes tend always to rotate them into a mirror-symmetric position.13 pages, 1 figure, Latex file. Several points clarified and expanded, two references added.Quantum PhysicsHigh Energy Physics - Theorytext