Trivia: A little foreshadowing - when the King first goes to the Poison Apple pub, a frog with ruby red lips asks him if she has met him before.
Trivia: In the scene where Fiona starts to cry, many bubbles can be seen to fall from the sky. In one of them is Fairy Godmother. This is a reference to The Good Witch in The Wizard of Oz.
Trivia: In the Fairy Godmother's workshop when Shrek dumps the cauldron of potion over the employees, two of them are transformed into Lumierre and Cogsworth from "Beauty and the Beast" (1991).
Trivia: Shrek calls the giant gingerbread man "Mongo", who talks just like Mongo from "Blazing Saddles"
Trivia: The mermaid that Fiona throws into the ocean is Ariel from Disney's The Little Mermaid.
Trivia: When Mongo falls into the moat, The Gingerbread Man jumps in after him screaming "He needs me." Elliot yells the exact same thing when E.T. is taken away, and upon submerging in the moat, Mongo says "Be good," just like E.T. in "ET: The Extra-Terrestrial" (1982).
Trivia: When the police are chasing Shrek, Donkey and Puss in Boots, the radio dispatcher says "We are in a high speed pursuit with a White Bronco....." This is a reference to the infamous O.J. Simpson car chase in 1994.
Trivia: The potion that is supposed to make Fiona fall in love with Prince Charming comes in a bottle marked "IX." That means it's *Love Potion No. 9*, which was a hit for The Clovers in 1959. Love potion No. 9 is also a film.
Trivia: During the first bedroom scene with the King and Queen, the king goes to stand on the balcony where he meets the Fairy Godmother. The queen asks where he is going, and the king replies: "Bit of trouble from the old crusade wound, gonna go outside and walk it off" while holding his knee. This is a reference to John Cleese's (King) character in "Fawlty Towers" (1975), Basil Fawlty, who has a war wound in the exact same place, and also uses it as an excuse to get out of a situation.
Trivia: The gate to Far Far Away is the famous Bronson Gate at Paramount Pictures Studio in Culver City, California.
Trivia: In the scene in the Fairy Godmother's workshop, there are two pictures placed next to each other. One picture is a profile of a mean-looking woman, and the picture next to it is of a profile of a witch. This is what Miss Gulch looks like when she transforms into the Wicked Witch of the West in "The Wizard of Oz" (1939).
Trivia: When Fiona beats up several people at the very beginning of the film, the moves she does are carbon copies of Chun-Li's Spinning Bird Kick and Ken's Dragon Punch from the video game series "Street Fighter 2."
Trivia: The first time Shrek enters Fiona's bedchamber, while she is talking to the Fairy Godmother, he starts to pack her stuff. Look at the poster on the wall. It features a blond singer, a dark-haired "guitarist" and it says "Stonehenge." A reference to the film "This is Spinal Tap" (1984), where a rock band with a blond singer and dark-haired guitarist play their hit "Stonehenge."
Trivia: At the very beginning of the Honeymoon montage, we see Shrek looking directly into the camera and moving it around to get a good shot of him and Fiona in front of the house. The is exactly the same as the opening credits for the late 1980s TV program "The Wonder Years" (1987).
Trivia: In the scene where Donkey and Shrek test out the potion they stole from the fairy godmother, they drop a bit on a mushroom below them. Later as they leave, the mushroom blooms into a rose. This rose is the enchanted one from Beauty and the Beast.
Answer: The gag is that the wolf has developed a peculiar sexual fetish: he wears women's clothing for fun and is attracted to pigs. The magazine was changed for the trailer to be less suggestive (and thus to make the trailer G-rated).