I saw a rule 34 of Scooby Doo - Correct.
I saw a rule 34 of Micky Mouse and Optimus Prime - Wrong.
(Please note, since I have suggested the second example, it is now being worked on by Insane Japanese Hentai Anmiation Artists)
The one thing that will get burned onto your mind. The one specific photo that will ruin your reputation...
RULE 34 POSTS.
Mostly made in DeviantArt and Tumblr.
Basically, they take characters from anime/other stuff, and make them fuck.
If it exists, theres porn of it.
My cock is dried out. I searched Rule 34 today. Not my proudest fap i should say.