Fog of Love
When someone finds their love interest more attractive than before they found love in them. It is a natural phenomenon that happens to just about every human being and, in most cases, isn't realised by the subject.
Gary - Emily looks good with or without make-up.
Bill - No she doesn't, you've just got a case of the Fog of Love.
Bill - No she doesn't, you've just got a case of the Fog of Love.