  In the Quantum Electrodynamics process $e^{+}e^{-}\to l^{+}l^{-}(n\gamma)$,
there are two well known angular asymmetries in the $cos(\theta)$ and the
$cos(\theta^{*})$ distributions. In this paper, the QED angular asymmetry
related to the $cos(\theta^{*})$ distribution is investigated in terms of the
Dirac propagator and the associated boundary conditions from which the Dirac
propagator is constructed and the potential implications are examined.
