Example 1: Snape/Harry
This is the pairing I simply cannot buy. No way, no how. It makes no sense to me at all and the times I've tried to read fic about it, I can't even make it through a paragraph without my brain screaming "No fucking way!" at me.
But I can and have enjoyed Snape/Harry fanart. I don't seek it out, but when I do see some, it doesn't trigger the brain-screaming at all. In fact, my brain often says, "Mmm, nice."
I wonder how a Snape/Harry fan comic would affect me. Hmm.
Example 2: Anime Hair and Eyes
When I'm watching anime, I can totally buy stuff like Sakura's pink hair or Momoshiro's purple eyes. It seems perfectly normal and I don't bat an eyelid.
But I can't bring myself to actually write something like that down. I couldn't write a Naruto fanfic and talk about Sakura's pink hair. When it's written down like that, I get the brain scream again. No fucking way!
Believing what you see is a good survival trait, speaking in the long-term evolutionary sense, so I can understand why my brain reacts that way. But I wonder why the strong rebellion when it comes to written things. I guess that my brain prioritises "accumulated knowledge about the world" above "something written down" but below "something right in front of my eyes".
It makes writing fanfic difficult sometimes.
Somewhat relatedly, I'm trying to write a scene for an anime fanfic where one character is sketching another. I wanted to write how it wasn't a realistic sketch, but more cartoony and caricature-like. And then I realised that, basically, that was how the character actually looks in the anime. So now it seems hopelessly self-referential and I think my brain is going to explode, just like it does whenever I have to code a recursive function.
And now I'm just procrastinating.