Gravity Falls (2012)

One of the oddities in the Mystery Shack is called the Sassycrotch (a play on words "Sasquatch", "sassy" and "crotch") and it shows a Sasquatch wearing a pair of underwear (no genitalia visible).

Grunkle Stan makes a vulgar comment about needing to "scratch two places at once" and often makes references to scratching himself, which his niece and nephew find gross.

Grunkle Stan has suggestive magazines in his room, which we find out in the episode Scary-oke. Though briefly shown, the magazines that the viewer can see are called "Women's Swimwear" and "Fully Clothed Women." No undressed or underdressed women are shown on the covers and the scene is played for comedic purposes.

Dipper gives a merman CPR and Mabel takes a picture of them (which was a clear shot that looked like the two boys kissing) which that she jokes it's for blackmail. ("The Deep End")

A man is married to a woodpecker, claiming that it's still "totally legal".

A boy has the back of his pants partially pulled down so his friends can pour ice cubes into his pants.

One scene where Soos, who has his shirt off, is sitting in a car with Grunkle Stan. Quiet jazzy music starts to play. He reclines his seat so it is lying down, and so does Soos, and he rolls over to face Stan and says, "Sure are a lot of stars out tonight." Stan says "Welp, this is getting weird!" and immediately gets out of the car. ("The Golf War")

During the end titles in "Soos and the real girl", Grunkle Stan is in a limo with several women in bikinis.

In an episode, Dipper accidentally lays on his crush, Wendy's, bra. She mentions, "Dude, you're laying on my bra." Dipper then screams in embarrassment. Brief and mild.

The girl character is always looking for a crush, and she wreaks havoc in the shop with her "crush finder" machine

Mentions of boyfriends and girlfriends, crushes and Mabel is 100% boy crazy throughout the whole series

Romance and puberty are frequently featured themes and are the main plot points of several episodes.

One of the main protagonists has a hopeless crush on someone much older than him. This is mentioned frequently throughout the series, and is often portrayed in a vaguely suggestive way. He stays up all night thinking about her at one point, and has a vision in Weirdmageddon Part 2 of her suggesting that they can get around their age difference.

One of the main protagonists (who is 12) flirts with and has brief relationships with a variety of boys, many of whom are her her age or slightly older than her, one of whom she shares a kiss with ("The Deep End"). She hardly succeeds, however, and the scenes and flirts in are meant to be funny.

Many side characters have romantic relationships as well, but only flirting is shown in lieu of sexual content or nudity.

One character is frequently seen wearing only boxers and an undershirt throughout, in a nonsexual context. Additionally, some characters are occasionally seen shirtless, in swimsuits or in their underwear, again, in a nonsexual context.

Puberty is mentioned throughout. In several episodes, one of the main protagonists is insecure about his masculinity deals with issues such as chest hair, voice changes, sweating issues, feeling awkward, etc.

Some characters have books or magazines with sexual content; this includes characters reading "age-inappropriate" romance novels, a book about puberty ("Carpet Diem"), adult magazines ("Scary-oke"), etc. There is no explicit sexual content in any of these instances and it is presented in a comedic manner.

There are some mild sexual jokes, including one about somebody's Internet history being creepy ("Into The Bunker"), and a brief scene of somebody taking a bath with squirrels ("Gideon Rises") etc.

A few very minor characters die or are implied to have died in various episodes. Deaths are usually off-screen, but when they are on-screen, it's never a graphic or bloody death and is often presented in a comedic manner.

Moderate nose or mouth bleeding can be seen in some episodes.

Action and fighting is present throughout the show. Some cartoon violence, brief injuries, and red cuts and bruises are shown, but there is usually very little blood or gore.

Characters are occasionally eaten whole, but later turn out to be fine. ("Summerween"; "Land Before Swine")

Monsters are sometimes dismembered, crushed, beaten, etc., but do not have any red blood or gore. Any monster blood is usually green. ("Scary-oke"; "Into The Bunker")

Occasionally, characters can be briefly seen without skin, revealing the flesh, muscles, and bones beneath. ("Sock Opera"; "The Inconveniencing")

There is some red blood, but this is usually shown briefly. In "Northwest Mansion Mystery", blood oozes out of the mouths and eyes of animal heads on the wall, and in "Society of the Blind Eye", through the bandages of a character's injured hand. A character gets a nosebleed in the climax of "Gideon rises", In "The Last Mabelcorn", a character is very briefly shown donating their blood.

In "Northwest Mansion Mystery", a character is killed after being hit on the head with an ax (off-screen).

Insults like: "suckers", "dumb", "idiots", "stupid", "shut up" etc.

Occasionally, there is discussion of murder or death. Very rarely characters verbally threaten to kill one another.

There is an instance of symbol swearing in the episode "Society of the Blind Eye".

There are some jokes about swearing, but no actual swearing.

Some minor things were censored and removed from the series on Disney+.

A witch removes Grunkle Stan's hands. He angrily requests that she return them to him so he can "share a special gesture" with her, implying that he's going to give the middle finger.

Mild scatological humor, including a video game character being made to say "poops and butts" by Mabel, and Mabel running a radio station with her pet pig, Waddles, which consists mostly of fart noises. The word "fart" is infrequently said aloud verbally.

A man tells a boy to "go suck a lemon".

In "Not What He Seems", Stan yells "OW! Hot Belgian waffles!" Just then, he realizes he's alone and he "can swear for real" yelling "SON OF A-!" The TV cuts off the last word.

The word wieners is seen spray painted on a castle in one episode.

A character calls a woman a "wench" a few times.

Juvenile insults like: "poop head", "butt face", "jerk", "nerd", "dork" etc.

Some religious exclamations.

Instances of "heck."

It is implied that characters make inappropriate hand gestures. ("Society of the Blind Eye"; "The Golf War")

Some teens spray paint words like "McSuckit" and "weiners." ("Society of the Blind Eye"; "The Golf War")

One incomplete use of "son of a..." ("Not What He Seems")

The expletive "flipping" is used once.

A character asks for a glass of a restaurant's most expired apple cider.

Mabel is distressed and she takes a shot of orange juice as if it is alcohol.

In one episode Dipper is walking down the sidewalk and he passes by a bar.

Overall, alcohol, drugs, and smoking are very infrequently mentioned, and mentioned in a comedic manner when they are.

Two underage characters enter a bar with fake IDs ("Headhunters"). This scene is meant to be comedic.

In another comedic scene, a character experiences fantastical hallucinations after consuming outlawed candy. ("The Inconveniencing")

Characters engage in an exchange of fairy dust and butterflies, but the set-up mirrors a drug deal. ("The Last Mabelcorn")

There is only one instance of smoking, where a character is seen with a pipe in his mouth. ("Headhunters")

The character of Bill Cipher does some disturbing things, such as pulling teeth out of a deer's mouth ("Dreamscapers"), summoning a constantly screaming severed head and then stripping all the flesh from it to reveal a skull ("Sock Opera"), rearranging Mr. Northwest's (Pacifica's father) facial features entirely ("Weirdmageddon Part 1"), or speaking in a demonic voice (various episodes). These moments are very brief, but may scare some younger or sensitive viewers.

Characters frequently use black magic to solve problems or for their own personal gain. This includes multiple instances of chanting incantations, spells, curses, magic crystals, potions, summoning rituals, demonic possession, raising the dead, etc. Some sensitive viewers may find these things disturbing.

Some spooky visual scenery throughout, such as dark caves and foggy lakes.

During Bill's Weirdmageddon, a giant severed head (not graphic) with an arm on top chases Dipper and says it wants to eat him.

Season two is significantly more intense and suspenseful than season 1.

The flanderization of Dipper may be considered frightening and intense to some viewers, and said flanderization ended up taking its toll for the worst in the episode Roadside Attraction.

Mystery and horror are frequently featured throughout the show. Although the horror can be considered relatively mild, many episodes have a lot of suspense.

Dipper and Mabel encounter a variety of intimidating creatures such as ghosts, demons, zombies, shapeshifters, and various kinds of monsters. Some of these may be frightening to young children.

There are some scenes meant to shock viewers, such as a scene where blood suddenly oozes out of an animal's eyes and mouth ("Northwest Mansion Mystery"), a scene where the bodily openings of Mr. Northwest's face are rearranged ("Weirdmaggedon Part 1"), etc. This contributes to the horror element of the show.