In "I Was A Teenage Stimpy", Ren is shown with a magazine, and says, "For the adult corn lovers." This was a reference to porn magazines. That, and probably the title card, could've been the reason this episode was banned. In the same episode, it's strongly implied that Ren thought that Stimpy were masturbating in the bathroom.

In "Rubber Nipple Salesmen", there are numerous references to nipples. Also, Ren explicitly points out that the rubber nipples make great "hickies".

In "House of Next Tuesday", it is suggested that Stimpy was wetting the bed (he makes pleasurable sounds).

In "A Hard Day's Luck", a cereal brand is called "Lucky Chodes" (a slang term for penis).

In "Son of Stimpy", Stimpy "gooses" Santa when he was looking for "Stinky".

Some innuendo in some episodes

In "Haunted House", where Stimpy is taking a shower, Ren opens the door and says very cheerfully not to "forget to wash where the sun don't shine".

In "Big Flakes", when Stimpy tells Ren that it was nice for his parents to lend them their cabin for the weekend, he gives a big smile and a suggestive glance.

In "Mad Dog Hoek", when Stimpy and Loaf are wrestling and Stimpy says, "I've come to play with you", we see that Loaf has an uncomfortable look on his face (his eyes go big).

There's some questionable moments with Stimpy and Sven in "Sven Hoek".

In "Pen Pals", Ren mentions getting a Bikini Wax.

In "Haunted House", Ren says, "Let's go up and wet the bed". In the same episode, after the ghost commits suicide, he's reincarnated into a naked man (no genitals are depicted).

In "Fake Dad", Stimpy tells Ren to "be nice to the product of your loins". In the same episode, Kowalski is reading (or attempting to) one of Ren's books entitled "Prison Love".

Some masturbation jokes in some episodes (take "Reverend Jack" for example)

In "Wiener Barons", Stimpy says, "I wish I had a wiener right now".

In "Powdered Toastman", Powdered Toastman's faithful assistant looks pregnant in the beginning of the episode (though her stomach looks noticeably flatter in later scenes).

In the Unedited version of the pilot Ren unknowingly kisses Stimpy (he is disgusted by this).

In one episode, the duo skinny dips without fur (no genitals are depicted). Later on, an equally naked old man (with a small bush covering his private area) joins them in the water; Ren and Stimpy's eyes bob and down as he runs, hinting at them viewing his junk, so to speak. In the same episode, an old naked man appears behind a sign reading "No ball playing".

In another episode where they disguise as babies, the couple and the duo have a community bath (the father removes his robes, we only see his knees, as Stimpy looks up). While in the bathtub with his wife and the duo, the father asks this random guy to hold them while he checks the door, the guy starts whistling a tune looking nervous. The father is outside with another person while a mailbox obscures his genitals (the mailbox opens for comedic effect).

Characters' butts are shown.

In a "Powdered Toast Man" episode, Powdered Toast Man has to save the President who is "caught by my own zipper!" (think "There's Something About Mary").

In "Double Header", Ren and Stimpy are both hit by a bus.

In "Double Header", Stimpy slaps Ren, but since his hand is attached to Ren's body, it's implied that Ren slapped himself (considering how hard he was slapped).

In "Jiminy Lummox", Ren pulls several violent pranks on Stimpy. In the same episode, Ren constantly gets hurt by Stimpy's conscience, Jiminy Lummox.

In "Dog Tags", Ren decides to commit suicide (this was later banned because of that scene).

In "I Love Chicken", Stimpy slaps Ren but not too hard.

In "Galoot Wranglers", Wilbur Cobb dies near the end.

There are some instances where a character tries to commit suicide (this became more noticeable in the Games era).

Ren is eaten alive by a vulture and his skeleton is shown from the neck down. The vulture then spits out the bloody pieces onto his body in "Road Apples".

In the episode "Ren's Toothache", there a is scene where Ren plucks out the nerve endings in his mouth with a pair of tweezers in a very very grotesque way.

A scene from the episode "Travelogue", shows Ren and Stimpy getting violently shaved in their backs with a knife. Their swelled up skin is shown afterwards. No blood is shown.

In the episode "Magical Golden Singing Cheeses" the man-eating village idiot severely rubs his elbow with a cheese grater; the cut skin and muscle mass inside the skin is shown. Then he rubs the wound with a sliced lemon and then dumps salt on the wound. Later Stimpy accidentally severely graphically shoves a crow bar in an orge's toe. His toe oozes slime and the toenail is seen ripped off. No blood is shown in these scenes, but it can still frighten some, including children.

One episode shows a few blood

Ren is tempted to break Stimpy's neck in "Stimpy's Fan Club".

In "Sven Hoek", Ren tells Sven and Stimpy he will rip their arms right out of their sockets, tear their lips off punch them, and gouge their eyes out (most of these being on the uncut version only). He says this in a menacing, creepy manner all while grinning in a very psychotic way.

One episode has been rejected by Nickelodeon, one of the reasons being that ren beats a character with an oar, though no blood is included. ("Man's Best Friend"). It is very cartoonish however and the man then congratulats Ren.

The episode "Haunted House" has a scene where the ghost attempts to scare Ren and Stimpy off with a fake severed head, which comes complete with fake blood. In the same episode, the ghost commits suicide by way of ingesting poison. He suffers quite a bit before dying, though this "death" results in him being reincarnated.

The pilot episode deals with them being put to "the big sleep" (a euphemism for euthanasia).

Ren is depicted as a psychopathic chihuahua with a short fuse and penchant for violence; indeed, Stimpy is repeatedly subjected to domestic violence from Ren, mostly in the form of a slap to the face.

In "Bass Masters", a fish is depicted twice as a "crappy". In the same episode, when Ren is caught by a fish, he is depicted as the "dumb bass", though most viewers won't understand that it was a pun on the word "dumbass".

Some episodes, most of them being in the Spümcø era, have characters say, "Oh, my God!" or "Sweet Lord!"

In "Superstitious Stimpy", if you look closely in the book Stimpy reads, you can see the word "damnation".

In "Bass Masters", one particular fish uses some questionable words, like "freakin'" and "motherlovin'".

In "Stimpy's Invention", Ren calls Stimpy a "sick little monkey".

In "An Abe Divided", when Ren starts complaining, one of the words he says is "fuckin."

In "Farmhands", there's a scene where Ren actually flips off Abner and Ewalt.

In "My Shiny Friend", when Stimpy starts to gamble, near the end he says "CRAPS"!

In "Hair of the Cat", Ren says "Oh my Lord!" when he thinks he's blinded because of his allergies.

There are some uses of the word "cripes" throughout the show.

In "Fire Dogs", "Rubber Nipple Salesmen", "Circus Midgets", and "Hard Times for Haggis", the potentially offensive word "midget" is used.

Many uses of Ren calling Stimpy an "idiot".

There are occasional uses of darn, heck and crap. There are 2 censored uses of hell in The Royal Canadian Kilted Yaksmen (although the latter use can be see in text if you pay attention).

The Scotsman In Space has 1 use of "what the devil".

Some name calling and verbal abuse as well.

In the episode "Marooned", when Ren is roused from sleep he opens the tent curtain and yells "Who the he -- ...?", obviously a cut-off utterance of "hell" before the L sounds were said.

In "Hermit Ren", there's a corpse that's holding a bag labeled "beer".

One scene from the episode "Terminal Stimpy" shows Stimpy dizzy and drooling at a milk bar ordering for a chocolate milk.

One character's name is George Liqour (only in the unedited version of "Dog Show" and the "banned" episode "Man's Best Friend").

A fish escapes from George Liquor's house in the banned episode "Man's Best Friend". He steals Liquor's cars and he puts a smoking cigar in his mouth before finally escaping.

A man who's face is unseen and wearing no pants is shown smoking a pipe in some episodes. Though he's not seen smoking it, in "Jiminy Lummox", he sticks the pipe into his glass of "water" as he begins drinking, with little bits of tobacco filtering out into the fluid.

In "Fake Dad", the temporary son shoves Ren's cigarettes in his mouth.

References to liquor in the uncut version.

Some scenes in the episode "Son of Stimpy" can be sad.

Some viewers may be disturbed by many of the gross-out scenes.

George Liquor's temper in the episodes "Man's Best Friend" and "Dog Show" can be a little frightening for children.

Near the end of "Stimpy's Fan Club", there is a scene where Ren attempts to murder Stimpy while he's sleeping, and this scene could frighten very young children.

The title card for "I Was A Teenage Stimpy", might be a little scary for youngest viewers.

The episode "Ren Needs Help!", is dark and might be frightening for younger viewers.

In "Ren's Toothache", there is a scene where Ren pulls his nerve endings with a tweezer. This scene could most likely disturb some viewers.

In "To Salve or Salve Not!", some viewers may be disturbed at the fact that the salve salesman keeps popping up in Ren & Stimpy's house throughout random places.

Some very little children might be scared of the Fire Chief and his obsession of hurting "circus midgets".

Though censored on Nickelodeon airings, some viewers might be offended at the fact that Powdered Toastman burned the Bill of Rights.

The scene in one episode where Ren chokes on lumpy oatmeal could be intense for younger viewers.

Ren is depicted as a psychopath. His psychotic fits may frighten and disturb very young children.

There are many scenes of gross-out humor, usually revolving around bodily functions.

Ren and Stimpy was considered controversal when it came out, it still has controversial content to this day. Despite Ren and Stimpy airing on a kids network, it isn't a kids show because of dark themes, sexual innuendos, violence and disturbing imagery.