@pink_rabbit
When you're watching a tv show, you want to see good looking people kiss, not ugly people. I don't know if that's true for you, but it's true for most people in the world.
There was once a superbowl commercial , where they were promoting something and they had a really sexy girl french kiss an ugly nerd. The kiss scene was the only thing that outraged everyone, not anything else in the commercial, just this 1 specific action.
What I'm trying to say is, it's normal to be uncomfortable at the sight of seeing ugly people kiss or 1 ugly and 1 cute and normal for people to like seeing 2 good looking people kiss.
Personally for me, I only like watching good looking people kiss. Especially in tv series like Orange is the new black, Shameless, or Grey's Anatomy.
It's usually because I'm attracted to both the males and womans appearances. If I saw 2 ugly people, no matter what type of build up, I'd still be uncomfortable (Unless it's a comedy and they start sucking each others faces in the weirdest way possible.)
What you said before in reply to the other person
*Give it time before you realize that looks isn't everything and it's all about the person inside.*
I think that should only apply if you are in a relationship with someone and they are classified as ugly. For example, you knew them for a long time and like their personality, so you decide to date them.