  We note that galaxy-galaxy lensing by non-spherical galaxy halos produces a
net anti-correlation between the shear of background galaxies and the
ellipticity of foreground galaxies. This anti-correlation would contaminate the
tomographic cosmic shear two point function if the effect were not taken into
account. We compare the size of the galaxy-galaxy lensing contribution to the
change in the cosmic shear two-point correlation function due to a change in
the dark energy equation of state w of 1%. We find them comparable on scales
<~5 arcmin for NFW galaxy profiles, and out to much larger scales for SIE
profiles. However the galaxy-galaxy lensing signal has a characteristic spatial
and redshift pattern which should allow it to be removed.
