Patrick's having a large penis is the basis for a lot of jokes on the show, yet the actual size is never really mentioned. However, according to the packing of the "Junior Patrick", a vibrator made in the image of Patrick's penis by one of his former girlfriends, it is supposed to be at least 10 inches.
During the masturbation discussion, Jeff reminisces: "you're shaking the caravan, Jeffrey!". At the porn store, we hear that there's a whole shipment to go to "Caravan Shaker".
The quote that they use in this episode is from a movie called "To Have and Have Not.", and is spoken by Lauren Bacall to Bogie. This quote is on AFI's list of 100 movie quotes, it is ranked number 34. : You know how to whistle, don't you, Steve? You just put your lips together and blow.
(Recognizing Patrick doesn't know a "sculpture" of his penis was actually a sex toy)
Steve: I think you may have been had, mate.
Jeff: And a lot more often than you realize.
Steve: If music be the food of love, then masturbation is just a snack between meals.
Jeff: Steve's whole fantasy life revolves around Mariella Frostrup… If he ever meets Mariella Frostrup in person his right hand will shout 'mother'.
Second appearance of Mariella Frostrup (the first is in episode 2)
Twelfth Night: Steve's quotation "If music be the food of love..." is taken from the opening lines of Shakespeare's play Twelfth Night, where the speech continues "...play on," rather than according to Steve's version.