Back to the topic: I am ashamed to admit how much time I spent trying to track down the Francis-Ford-Coppola-directed softcores. That's the porn I want to see the most.
Another porno-thing I spent forever tracking down and finally found was "Eveready Harton in Buried Treasure" - a pornographic cartoon from the 1920s created for the birthday party of the legendary Windsor McCay. Apparently all the big names were involved in it: Max Fleischer, the Terrytoons guy, the guy who did Woody Woodpecker, a ton of others. And the film had to be produced in Cuba since it was too explicit for the US production houses. It's like Fritz the Cat's long lost granddaddy. It features MF, MM, beastiality, gloryholes, everything you never guessed people from the 20s knew about.
Yes I know this is extremely nerdy of me, but this kind of high profile porn is hard to find and the searching is half the fun.