Cannot Unsee the Undead

The crisp afternoon sun illuminated her features, revealing her face as a ghoulish mask. Her attractive veneer became translucent over her skull, hinting that she was an animated corpse in transition, and desire at once vanished from having inadvertently seen her as an unsexy composition of failed flesh.

Disqualification of disqualifications! She was the walking dead, and there was no longer any reason to steal her from her boyfriend.

Seeing her as an empty, dead body kills the romance. You can't rate lower than being useless.