- Mild
- Sexuality jokes throughout the series.
- There are many, many sexual references in this show. In some episodes characters say "sex and vagina and penis" In other episodes characters briefly talk about affairs and sex. There at least 5 sexual references in every single episode.
- Sex is a constant theme of most episodes, with discussion, references, and comments about sexual activities continuously in each episode. Also lots of comments about strippers and porn. While no nudity is shown, couples sleep together and are shown in bed together a lot.
- There is a part in one episode where the characters are playing strip Happy Days game. We see someone in a bra and it is implied that a character has nothing but his boxers on but we only see the top of him as he is sitting down.
- Many sexual references throughout the entire series, several each episode. A lot of implementation of sex and sexual acts such as "BJ." Dirty jokes are constant from one specific character.
- There are some references to sex, penis, vagina, blowjobs and condoms
- There is a lot of episodes that the women don't have bras on and you can tell.
- One of the main themes of the show is romance and relationship, but nothing too explicit is ever shown.
- Many passionate kisses between characters.
- In some episodes, characters are shown in bed together before or after sex, but as always nothing is ever shown.
- Joey is a womanizer and often sleeps with the people he dates. Joey sleeps with countless women throughout the series. It is once joked that he has slept with every woman in the city and is making a second round.
- There is a running joke throughout the series that the six friends spy on Monica's naked neighbor, initially calling him as 'cute naked guy' but later 'ugly naked guy' after he put on weight.
- One of Ross's ex-wives divorced him after having an affair with a woman and discovering she was lesbian. She then goes on to be the centre of many lesbian jokes throughout the series.
- In one episode, Chandler enters Monica and Rachel's apartment whilst Rachel is having a shower. Rachel enters the room nude from the waist up, not noticing Chandler. When she sees him, she screams and covers herself up. This scene becomes a running joke and the main plot point of the episode.
- At the start of Season 5 Chandler and Monica has sex and the whole season is about hiding it from Ross, Joey, Rachel, Pheobe. Joey ends up finding out and in the Episode called 'The one where everyone finds out'. Everyone figures it out
- There is an episode where it is heavily implied although never said that Joey is circumcised.
- In another episode, Ross is in bed. Rachel walks in wearing lingerie designed after Princess Leia's golden bikini from Star Wars: Return of the Jedi. They are about to have sex until Ross accidentally imagines his mom in the costume due to something Chandler said earlier. This disturbs Ross.