Some of the last lines in the finale break the fourth wall, wondering if a show about a bunch of kids masturbating is child pornography. The Hormone Monster says, "Holy shit! I hope not! I mean, maybe if it's animated we can get away with it. Right?"
Kroll: It's yet to be seen whether we can really get away with it [laughs].
It does seem like you get away with a lot, though. The Garrison Keillor jokes in Episode 7 are insane!
Kroll: Yeah [laughs].
Who came up with the idea to cut his head off and have sex with it?
Kroll: Before we even got to what happens to Garrison Keillor, I think we were pitching on, "What is the kind of thing that would make you not have a boner?" Like, here's a picture of your grandma. Or, think about sports. That kind of stuff. Our goal is always, "OK, what's the obvious joke here? Or, What's the joke we've seen before? And then, How do we then take that idea and find a weirdly specific reference or version?"
I don't remember exactly how Garrison Keillor came up, but first we built in that [anti-boner] joke, and then we knew we were writing this bizarre nightmare, so everything got heightened. At the end, it felt like, if you're having an extreme nightmare, the worst thing we could do would be to do what we did. The beauty of the show is that we then get to be meta and talk about how crazy, weird, and disturbing it is what we did to Garrison Keillor -- who I'm a fan of! I used to listen to A Prairie Home Companion.