There's an attempted rape scene.

Sexual acts are portrayed on-screen and off, including kissing, touching, intercourse, and oral sex. Characters are seen in their underwear or naked beneath covers. Male actors are shown without shirts, but there's no nudity.

Sex is mentioned 3 times in season 2 episode 14.

Seasons 1-3 are fairly clean. The sexual references become more frequent as well.

Frequent moderate violence involving vampires and demons. Usually with just punching and kicking. Vampires are often 'dusted', which involves stabbing them in the heart or decapitating them. They then turn into dust with no blood. For a show about vampires, there's very little blood shown.

About 2 or 3 uses of shit per episode.

Occasional mild language includes "ass," "piss," "bitch," "bastard," "wankers," "bugger," "bollocks," "damn," "crap," and "bloody," as well as name-calling and slurs such as "spaz," "loser," "dork," "whore," "ho," and "slut."

In one scene Giles calls a computer programme the slur 'fag'.

A few episodes have references to the word 'pussy'.

Mostly damn and hell, but occasional instances of bitch, ass, slut, wanker etc. There is also some occasionally crude sexual humor. The word "bollocks" is used once or twice. The word retard/retarded is also said which may be an offensive word to some.

Seasons 1-4 have infrequent strong language however, seasons 5-7 has more frequent use of strong language

Several characters smoke throughout the series; however, it is mostly villains who do so.

One of the main vampires gets drunk at a bar in a few episodes and ends up going nuts and attacking Buffy.

Vampires smoke cigarettes on a number of occasions. Characters drink at bars and with dinner, including an incident where an underage character may have accidentally drunk alcoholic eggnog. Mild intoxication. Drug use is alluded to in the form of addiction to magic and the consumption of "happy cookies," as well as vampires and humans taking a fictional drug called "orpheus," which appears to have a similar effect to opioids.

Some alcohol can be seen being consumed. In a few episodes people appear to be 'high' on magic. Some mild drug references. One of the main characters, a vampire named Spike, smokes cigarettes regularly.

A few episodes are very dark, and some of the vampires and demons can appear scary.