Love veils ugliness.
Note: The ancient Romans often depicted Cupid, their god of love, as blindfolded because love was thought to be blind. The more common image of Cupid as a winged boy shooting arrows was actually taken from earlier Greek images of Eros, their god of love. But the Greeks also knew that love was blind. Eros was thought to randomly fire his arrows into the hearts of lovers. So no one could explain where their heart led them.
I have heard of reasons manifold
Why love must needs be blind,
But this the best of all I hold —
His eyes are in his mind.
Coleridge, Reason for Love’s Blindness, 1828.
Some pundits have noted that love is blind but marrage restores sight.