So once I thought about it, it was fairly obvious how I had to finish this series. I had to recommend a vid that can only be recommended on its own, because it is in a class by itself. (And that class would be, like, the 2011 graduating class of Arkham Asylum.)
I Swear, by dualbunny, greensilver, pipsqueaky, and sweetestdrain, all of whom should definitely win something for this, although I suspect that something is maaaaaaaaybe a free psychological evaluation. Smallville, Clark Kent/Lex Luthor, and also vidders/crack.
This vid is insane. I just want to make that clear up front. I saw it at VVC last year, and I will never forget the crowd's reaction. Because, okay, this was shown anonymously (although the vidders did come out later), and I think I was probably not the only person in the room who was a trifle worried about this song and this fandom and this setup. And then the vid builds. And builds. And just when you think it cannot get any better - look, I'm not going to tell you what happens, and also you should avoid reading the notes on the download page (basically, don't scroll down past the lyrics), just so that you can go into this as untouched and virginal as Clark when Lex tenderly presses him to the white satin sheets on their wedding night and says - no. No. See, this is exactly the problem with this vid. You watch it too many times and it restructures your brain.
But your new brain is a place where Kryptonite unicorns and gay weddings co-exist, so I'm not saying this is a bad thing. I'm just saying - after you watch this one, you'll read every crackfic ever written for the rest of time and say, "This isn't that unrealistic." And that won't be true. It's just that your standards will have been recalibrated.
Basically, this vid started out giving me flashbacks to Smallville fandom, which was an impressive feat because I pretty much missed its heyday. And it finished by causing me to laugh so hard I risked rupturing key organs. So I'm not saying it isn't dangerous. I'm saying you need to watch it anyway. This kind of fannish masterwork doesn't come along every day.
And if you've already watched it - many people have! And survived! - you should definitely take this time to watch it again. Every time you view it, you see something new. (Uh, usually something that tests your grip on reality. But that is perfectly okay, because it substitutes a better reality.)
Also posted at Dreamwidth, where there are comments.