Remember 2004? Could it be that it was all so simple then? Or has time rewritten every line? Yes, yes and yes. Back then, it was very simple — Conan O’Brien was taking over the Tonight Show from Jay Leno in 2009. Changing of the guard. Passing of the torch. Handing down a treasure from generation to generation. Ah yes. It made all sorts of sense — then.

Well, if they’re gonna push you out, you might as well have fun while you’re going. And Conan O’Brien, if nothing else, is having fun. Last night’s fun: Listing the Tonight Show on Craigslist.

Yes, there were barbs — but tonight, the sign that Conan O’Brien is done with NBC and The Tonight Show was less about twisting the knife in his rivals than hilarious and extremely dirty porn puns. Put it this way: If you were trying to recapture Jay Leno‘s demo, would you do it with “”The Fistahood of the Traveling Timeslots?” I don’t think so.

The early days of this week seem like a Disney movie compared with the ugliness that’s broken out in the late-night comedy wars. Before, they were topical jokes blaming one common corporate villain; now, it’s everyone attacking everyone — and Jay Leno is getting in on the action.

It’s official: Conan’s bitter.

Tonight, again, Tonight Show host Conan O’Brien‘s monologue was laced with jokes sticking it to NBC — plus the first salvos that seemed intentionally aimed at Jay Leno. Until tonight, Conan’s mentions of Leno himself were benign, instead focusing on NBC’s plans with respect to both their shows — which Leno has echoed emphatically on his own show. Tonight, that ended.