  The non-exponential character of the structural relaxation is considered one
of the hallmarks of the glassy dynamics and in this context, the singular shape
observed by dielectric techniques has attracted the attention of the community
for long time. Particularly, the exceptionally narrow dielectric response of
polar glass formers has been attributed so far to dipolar cross correlations.
Here we show that dipole interactions can couple to shear stress and modify the
flow behavior preventing the occurrence of the simple liquid behavior. We
discuss our findings in the general framework of the glassy dynamics and the
role of intermolecular interactions.
