Trey Parker and Matt Stone originally wanted the role of T-Rex to be played by a plus-size stripper known as "Eartha Quake", but had to find someone else when they discovered that she had recently lost all her excess weight.
T-Rex's voice is dubbed by an uncredited Trey Parker. The same is true for Maxxx Orbinson's employee who is on the phone when Sancho comes in.
The Region 2 DVD has an alternate cut of the movie with alternate dialogue and lack of sound effects in certain scenes.
When Lisa is looking through the video store, under "Epics", the videotapes are as follows, in this order: Birth Of Jesus; Jesus Of Nazareth; Jesus The Healer; Jesus Of Nazareth (again); Jesus Scissorhands; Pulp Jesus; The Good, The Bad, Jesus; and Raging Jesus.
Trey Parker and Matt Stone had originally intended for the film to be a musical; like their previous film, Alferd Packer: The Musical (1993) (aka Cannibal! The Musical). Unfortunately, they had trouble enough finding investors for the unusual story of Orgazmo on its own, so that idea was dropped.
The comic book pictures shown, are actually reproductions of classic comic book moments with heroes like Superman, Spider-Man, and Captain America replaced by Orgazmo.
A large poster of Kiva from the "Kiva's Creme a la Mode" box-cover can be seen prominently on display in the background of several scenes.
The movie was actually shot and completed in 1996.
The clips from the movie that are seen playing in the video store were taken from a fake trailer for the film, made by the filmmakers before production ever started, which was shown to potential financial backers to try to raise money to make the film. (This is discussed in the "drunken commentary" feature on the DVD)
In the scene in the video store (the one when Lisa finds out that Joe has been doing porno films), the first shot shows the top row of a movie section. Contained in this row are all movies by Troma Studios. Troma owns the rights to Trey Parker's first film, Alferd Packer: The Musical (1993) (aka Cannibal! The Musical). Parker has also noted Troma as inspiration for his style of filmmaking and for South Park.
Most of the bad guys are named after people with the first name Roy: Maxxx Orbison is named after Roy Orbison; Rodgers is named after Roy Rogers; Ron Jeremy's character, Clark, is named after Roy Clark; and A-Cup is take on the name Roy Acuff.
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