To heal maybe?

[ rolls his eyes and starts to gather his things up. Karkat bites his lip, then sighs. ]

Bright red isn't in our color spectrum, okay? It's a mutation. A defect. Since our blood carries pigment in it, it means that my body doesn't produce any at all. My lifespan is probably hideously short, my core temperature is the highest of all trolls, and...

I don't like being seen as weak and defective.