Characters
I’d kiss you if you weren’t so damn ugly.
— Scully · The X-Files

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker offers a backhanded insult: a kiss would be possible if the other person's looks were not so bad. The blunt teasing withholds affection while hinting at attraction, and its tone could be playful banter or plain rudeness.
Context reviewed