It's Always Sunny in Philadelphia

Mac (Rob McElhenney) officially comes out as gay in Season 12, Episode 6, 'Hero or Hate Crime?', and later expresses his sexuality through a poignant dance sequence in Season 13, Episode 10, 'Mac Finds His Pride', to his estranged father. The show features Carmen (Brittany Daniel), a transgender woman, with whom Mac has a romantic and sexual relationship in early seasons (e.g., 'Charlie Has Cancer' S1E4 and Season 3), with Mac initially struggling with her anatomy. Glenn Howerton, who plays Dennis, has stated that he believes all the main characters are 'a little ambiguously gay', and Dennis himself has an implied threesome with two men while blackout drunk in the pilot episode.

The gang frequently engages in physical abuse and manipulates each other, and in 'The Gang Wrestles for the Troops' (Season 5, Episode 7), Cricket is depicted being subjected to violence. Frank Reynolds accidentally causes the presumed death of a rival's daughter by knocking her into a stool during a boxing match, a dark spoof of 'Million Dollar Baby'. The show includes references to child sexual abuse, such as Charlie's play about being molested by his Uncle Jack in 'The Nightman Cometh' (Season 4, Episode 13), and jokes about children being molested appear in other episodes.

Themes of sexual coercion and stalking are central to the show's satire. In 'Make Paddy's Great Again' (Season 12, Episode 3), Dee and Frank participate in an orgy with a Dennis sex doll, which includes graphic descriptions of sexual acts and Dee's voyeuristic enjoyment. Dennis Reynolds is often implied to sexually assault women, and in one episode, he attempts to secure consent via text messages to avoid legal repercussions, while also depicted groping a woman without consent. Charlie Kelly explicitly describes Dee raping him in 'The Gang Misses the Boat' (Season 10, Episode 5), stating she held him down and covered his mouth to prevent him from stopping. Nudity is present, with review outlets confirming sex scenes in later seasons include nudity.

The F-word is used uncensored numerous times throughout the series, notably in episodes like 'A Very Sunny Christmas' and 'Making Dennis Reynolds a Murderer' (Season 12, Episode 5). Reddit discussions among fans highlight the noticeable increase in uncensored profanity from around Season 12 onwards. The general content descriptors for a TV-MA rating inherently suggest the pervasive use of strong and offensive language.

The gang regularly gets 'wasted all day' at Paddy's Pub, with alcohol consumption being a key driver of many plotlines. Charlie Kelly is notorious for huffing various hazardous chemicals and consuming questionable substances, often to achieve intoxication. Dennis Reynolds experiences 'alcohol-induced bisexuality' in the pilot episode, leading to a threesome, and 'alcohol-induced idiocy' is a recurring comedic element throughout the series. Frank Reynolds often displays extreme alcoholism and drug use, including references to huffing paint and other illicit drug consumption.

The show is built on 'comedic sociopathy' and features protagonists who 'embody the worst of us,' leading to frequent disturbing and intense situations. Characters engage in extreme acts such as cooking and eating their own dog, and attempting to consume a human corpse from a morgue. Frank's elaborate revenge scheme on the Ponderosa twins involves manipulating them into digging up their dead mother's body, a traumatic event that causes Dennis to break down emotionally. The gang is often responsible for ruining lives through their manipulative and reckless schemes, including false accusations of child molestation.

The core group of protagonists is universally described as 'morally bankrupt,' consistently engaging in selfish, irresponsible, and short-sighted behavior that often exploits others. They are notoriously 'terrible to each other' and to nearly everyone they encounter, employing insults, schemes, and manipulation as their primary modes of interaction. In one episode, the gang attends a sexual harassment seminar but deliberately uses offensive and sexually charged language, mocking the purpose of the event. Their disregard for laws, personal boundaries, and ethical conduct is a constant feature, as seen in episodes where they exploit people for their own gain or ignore public health guidelines.