Most sex scenes are only implied and no nudity is shown throughout the series

Expect kissing and cuddling -- between both opposite- and same-sex couples -- and it's implied that a few have sex, though nothing is shown. Nudity is limited to the occasional guy walking around shirtless. A student and teacher carry on a romantic relationship, despite her parents' rules against it. Teen girls often wear skimpy clothing or revealing bikinis and talk about being "sexy." The older characters in later seasons have often settled into stable relationships, including same-sex ones.

At the beginning of the series, it is said that a boy was in love with his stepsister, and would always try to have sexual actions with her, but it is later revealed that the sister had feelings for him. There are scenes of Emily kissing and behaving intimately with her girlfriend/female love interest. It features some kissing and hugging between the main characters (i.e. teenagers) with mild verbal references peppered throughout as they struggle with the issue of sex and intimacy in their relationships, but no actual lovemaking is depicted. (The main characters make verbal references to losing their 'V-card', 'getting off', 'doing it', etc.)

In addition, the series features some verbal references as the other characters talk briefly about sex and intimacy in their relationships, with some shots of women making out with their boyfriends, but with no nudity or sex depicted, as well as mild verbal references to losing ones virginity, hooking up, being on the pill, etc.

Throughout most is the show, one of the main characters is dating her teacher, however when they met, he wasn't her teacher.

In season 5 there is a sex scene featuring Aria. It is crosscut with a make-out scene between two girls, and is played against music. At the end of the sex scene, Aria is heard asking "Does that hurt?', and then her bare back is shown as she pulls the sheets over herself and her partner.

In a flashback, there is a pregnancy scare with one of the main characters.

In a flashback, a rumor goes around about one of the mains having sex with her boyfriend, and one of her friends says she 'is shy on the streets, and sexy in the sheets.'

One of the mains has had multiple relationships with her older sister's fiancés.

In one scene, a girl is in the shower with a boy, not for sexual reasons, but to avoid her mother. When he turns around, she looks down and smirks.

A father cheats on his wife with a college student.

To avoid her daughter going to jail, a mother sleeps with a cop, and sex is implied.

A mother and one of the main girl's brother kiss. He is later seen walking down the stairs, buttoning his shirt.

There are many deaths in the show, most of which a body is shown.

In season five, there is a murder in a house, by A, and blood is all over the house, including broken furniture.

A man is hung from the ropes of a bell-tower.

A girl is hit by a car and goes to the hospital, though no blood or anything is shown.

Towards the later seasons, the show grows increasingly more violent, as we see the girls grow up.

Intermittent use of "damn," "bitch," "hell," and "ass." Women call each other "bitch" semi-playfully: "Wake up, bitch."

Occasional teen drinking and drug use, including teen girls smoking pot. Often there's a repercussion to the behavior, though, as when a girl gets sick and vomits on a wedding dress. After a time jump in later seasons, the now twentysomething main cast often drinks, generally at dinner or at parties.

Season 4 features some references to drug use where characters are seen popping pills in a various episodes.

Throughout season five, one of the main girls develops a drinking habit, but it soon goes away.

One of the main girls in the past was addicted to her medicine and developed a drug problem. Later, the girl gets addicted to caffeine pills, and later has to have a counselor help her.

There is a bit of underage drinking in the show.

There is always a sense of peril throughout the show.

Examples are sequences where Emily brings her girlfriend home for dinner, much to her mother's disapproval as well as her trying to cope with being together with a closeted lesbian where she is unhappy that their relationship has to be kept a secret, etc.

The series as a whole takes on a darker tone as well, with one of the minor characters being confined in a mental institution.

One of the main characters also suffers from a mental breakdown of sorts later in the series after realizing that her boyfriend has been making use of her.

There are many jump scenes, though nothing too scary.

In season 5 & 6, we find out that A has created a life sized dollhouse in an underground bunker, and he locks all of the girls up in it. One of the girls comes out with PTSD.

A lot of the problems in the show are real life expieriences. Examples: divorced parents, deaths, break ups, etc.