Half-Face 1:

Hey, you've got a weird face like me.
Must be hard to deal with having half a mouth.
And half an actual face that's stuck on your body.
Your grey side is plated onto your dark side, right?
That's why the back of your head is fully dark?
Your anatomy is strange. I like that.
People like us get treated weirdly by regular folks.
"Wow, yeah, bet you tripped because you were too stupid to grow another eye!"
"God, you're such an idiot! Half-brain freak!"
What they don't know is that it's scientifically proven that half-brains to be easier to deal with, and you make smarter decisions that way.

Half-Face 2:
...Actually, I shouldn't say that.
That implies everyone with full brains are stupider than us. That feels wrong.
And it's especially untrue.
"Smart" is subjective and different for everyone.
Saying something so untrue and immature like that feels like a double standard.
"You should accept people like us. But also you're the stupid one!"
I've learned to be a better person today.