Because even the blind can't resist such a prank sometimes.
A type of abuseThe Bully can inflict on others. Theswirlie is portrayed half the time as a real shot of some poor kid getting his head stuck in the toilet, and the other half as a bully simply mentioning the word "swirly" to the cringing dismay of all the bully victims in earshot.
Rare case inKyou Kara Maou; the main character get his head dumped in the toilet only to end up in the magical kingdom where he is ruler.
An even squickier example inIchi the Killer: in a flashback, a bunch of bullies shove the title character's face in a toilet already full of poop, trying to force him to eat it.
In theSin City story, "The Big Fat Kill," theJerkass Jackie-Boy gets his head shoved into the toilet by Dwight McCarthy as payback and humiliation for abusing his ex, Shellie. This is part of what kicks off the main plot, as Jackie-Boy doesn't take humiliation well and seeks to take it out on someone, preferably a woman, and leads his boys into Old Town.
Jackie-Boy: You're making a big mistake. Dwight: Yeah, well you already made a big mistake yourself. You didn't flush.
Dudley: They flush people's heads down the toilet first day at Stonewall. Want to practice? Harry: No thanks. The poor toilet's never had anything as horrible as your head in it -- it might be sick. Narration: At which point Harry ran away before Dudleycould figure out what Harry had said.
In theAnimorphs series, Tobias mentions that he became friends with Jake because the latter once saved him from a couple of bullies that were about to give him a swirlie.
In an episode ofFrasier, Niles and Frasier talk about how this happened to both of them in prep school - apparently to a chant of, "There goes Crane, down the drain." When the boys that bullied them come to Frasier's apartment to repair his toilet, Niles makes amends with the brother who bullied him, and Frasier gets his own back by sticking the other bully's head in the toilet. At the end of the episode, Martin fixes the toilet himself, and quips to Eddie, "Don't drink that! Some guy just had his head in there!"
There was one episode ofLaw & Order where this was used as an interrogation technique in hopes of rescuing a kidnapped girl.
One episode ofMy Name Is Earl begins with Earl allowing Randy to give him a swirly in the Crabshack bathroom to make up for having done the same to Randy when he was five. When Earl thanks Darnell for cleaning the toilet first, Darnell explains that the last person who was given a swirly in one of those toilets ended up with a strange bat-disease.
A fourth season episode ofSupernatural has a girl give a cheerleader who'd been rude to her a swirly until she died.
In the third season of the television seriesQueer as Folk, one of the main characters gives a swirly to his little nephew, who not only tried to take cash from his wallet, but was also spouting homophobic slurs taught to him (Or so th main character infers) by their grandmother.
The Simpsons: one time when it was the last day of school aMontage showed various people/places in the school counting down the last 10 seconds; one of these was Milhouse, as he got one of these courtesy the school bullies.
In an episode ofRecess where Spinelli is accused of throwing a rock at Randall, her punishment if found guilty is a swirlie.
In theBatman: The Animated Series episode "Joker's Millions", Batman tortures the newly wealthy Joker's accountant into divulging the clown's whereabouts by sticking the guy's head in an Iceberg Lounge toilet and flushing. Repeatedly.
In theCodename: Kids Next Door episode "Operation: F.O.U.N.T.A.I.N.", the Delightful Children try to get information from a student named Leona; she won't talk initially, so since they happen to be in the school girls' restroom, they tell their henchman Lunk to "introduce her to Mr. Swirlie". After he does so, they threaten to show her "Mr. Swirlie's downtown office" (which means a very filthy toilet) and she talks. This leads to aBrick Joke much later in the episode,where the heroes find Leona and the villains at the Fountain of Youth; after a fight sequence, the Delightful Children are dumped in it, reducing them to infancy, and Leona calls it "Mr. Swirlie's corporate office".
A ghost story in Japan tells ofHanako-San, the spirit of a young girl who haunts school rest rooms; in most stories, she is a mischievous spirit who likes to play pranks on other students, including a swirley. In others, she's far more malevolent, and might do so with the intent to drown him, or evenflush the victim down the toilet andthrough a portal to Hell.