During the show they are going to live together in a isolated house which will hopefully results in lots of sex and drama and high ratings for the network. This being The Onion, things quickly take a turn for the worse. Watch it here.
Sex House contains examples of:
Accidental Murder: The housemates take the Sybian repairman hostage and chain him up in the mold room. When Derek later suggests they release him because he has nothing to do with keeping them imprisoned, they discover that the mold has killed him.
Alcohol-Induced Idiocy: Frank apparently drinks enough that cheating on his wife with an eighteen year-old virgin seems like a good idea.
Dirty Old Man: Frank, who is married with two kids, won a pizza contest to be on the show and claims that he's not going to have sex. He is the only one who has had sex in the house (besides those he had sex with, obviously). He cheats on his wife with a teenage virgin and again with a fraud therapist who was roleplaying his wife. He has gotten Erin pregnant, and maybe the therapist.
Distant Finale: Episode 9 occurs twelve "christs" since the show was abandoned, after which Erin's baby has been born and the cast have started a tribal civilization within the house.
Subversion: it turns out that 9 is the penultimate episode, and the finale is a reunion episode. It isn't explained how the cast are now vapid reality stars on the outside.
The Ditz: Tara parodies this archetype. She gets smarter as the situation becomes more dire.
Downer Ending: The cast has gone tribal within the house after being abandoned by the producers. They don't try to escape once they can and have developed rituals as they live off the little nourishment they have left.
Driven to Madness: All of the housemates, as well as the camera crew, to the point that when they're given a chance to escape, they choose to keep themselves confined.
Everybody Has Lots of Sex: The premise and goal of the series. Turns out people aren't horny when kept prisoner, malnourished and poisoned, not to mention all totally incompatible with each other, Jay and Tara excluded.
Fantastic Drug: The "cloudy drink" supplied to all the residents in episode 7.
Festering Fungus: The room where they stash the moldy food cultivates this very quickly. In episode 8, the repairman the cast kidnaps dies in there because of it.
Foreshadowing: Plenty in the first episode. From Jay tapping on a faulty lightbulb in an almost empty back room, over Erin accidentally breaking off a handle on a cabinet, to Derek's comment on how there is more alcohol than food in the house.
Hanlon's Razor: The horrible things that happens to the housemates aren't intentional, but rather the result of the producers and the staff on the show being either grossly incompetent, stupid, lazy, cheapskates, or some combination thereof.
Derek: "To call this place 'evil' implies a clarity of purpose that I do not want to attribute to anyone involved."
Hidden Depths: All over the place, despite the best efforts of the editors.
Tara seems like your typical airhead, but she's the only one who realizes the drugs are poisonous.
Tara and Jay, in a subversion of Reality Show Genre Blindness, realise that the reason they're so compatible is because casting agents realised they would be compatible, and choose not to have sex.
Jay looks like a typical Jerk Jock at first, but when the group go mad, he becomes a sweethearted farmer.
Frank looks like a rather pathetic figure in the first episodes, but ends up beating the crap out of the mysterious masked man and leads the group when they succumb to Stockholm Syndrome.
Alex: Soren Damgaard is the hottest thing going now. I've heard of him.
Ho Yay: Invoked and Exploited. Or at least attempted exploited. The Host tries to force the drugged Derek and Jay to have sex in episode 7, though all that ends up happening is that Derek very awkwardly lies on top of Jay while sucking on his own shirt.
Incompatible Orientation: Derek is the only gay guy in the house, to his disbelief. The producers of the show appear to not understand Sexual Orientation, if not sex in general.
Alex tries to come on to the Host, but he's asexual.
Interrupted Intimacy: What stops Jay and Tara having Sex altogether and realizing their circumstances are a bit fucked up. Before this, Erin's crying and the smell of a dead animal underneath the floor put them off.
The mould stops Frank and Alex "experiencing each other's bodies".
No Name Given: The Host, who refuses to divulge any information about himself.
No Sex Allowed: The cast agrees to not have any sex and refuse to play along when they all realize they're in a very disturbing situation. Frank fails.
Not Quite Dead: Frank in episode 8. We see his lower half from a ceiling camera as he gets mercilessly beaten by a man in a mask. When he enters the room where the rest of the cast is hiding, we get this exchange:
Frank: I got him. I got the masked goon.
Erin: How did you do it?
Frank: I wasn't afraid of dying because I thought I'd already died.
Offscreen Moment of Awesome: Quite a few dramatic and even heart-warming events have vaguely to alluded both in-series and by the writers. Justified by the In-Universe producers rigorously editing the footage in post-production, and leaving a lot of things on the cutting room floor.
Only Sane Man: Derek, although the other housemates eventually also come around to realize how screwed up things are.
On the Next: In style of Arrested Development the "Next Time on Sex House" previews are in part used for small one-off gags that don't actually appear in the next episode.
However, there are also actual previews of the next episode as well, somewhat confusingly.
Parlor Games: The gang play Truth or Dare. Awkwardness ensues.
Pixellation: Used when appropriate. One does wonder if it might not defeat the purpose of the show.
Stealth Parody: There are, as typical for The Onion, a number of people who believed the first episode was a legitimate reality show (and have never heard of The Onion). (To be fair, it was convincingly well acted and edited.) Later episodes have declining viewership (as typical for Youtube serials) but it's funny to wonder how long some people kept on believing...
There Are No Police: Nobody complains about the blatant immorality of the show. When the housemates start starving and their living conditions become dismal, there is no intervention by the authorities. It gets especially odd when taking into account that the show is being broadcast on TV, and yet none of the friends or family members of the cast ever appear.
Took a Level in Badass: The entire cast eventually does, culminating in episode 8, where they attempt an escape.
Twofer Token Minority: Derek who doubles as the token black and the token gay participant. The joke is about how The Real World and similar shows will have a gay character who is rather awkwardly around when the housemates are at a bar flirting around.
The Voice: A deep voice will often give instructions through loudspeakers, much to the annoyance of the contestants. In the last episode, the deep voice is revealed to have been an audio technician who developed a crush on one of the contestants.
Said episode is a reunion episode, as typical for reality shows. It's not explained how it follows from the end of episode 9, but the cast have now become vapid reality stars: Derek is "Ex-Gay" and writing for Coolio, Erin gave her baby up for adoption to focus on her blogging career, Frank and Jay are writing movie scripts together and Alex is dating the announcer who stalked her. Oh and the mold is used in a vaccine to cure disease.