A man and two women are seen in the shower together.

one of the girls is wearing Evans daughter clothes and she is wearing unicorn underwear and she takes them off and she so him her butt and she forcedly kisses him

a attempted sex scene but they don't have sex

There is a sexual scene between two women and a man. They are briefly seen having sex behind a frosted panel in the shower (very blurred) it is very quick

3 very quick sex scenes one is a quick sex scene in a shower but it is hard to see one is a quick sex scene with a guy and 2 girls at a time 1 he has sex with the blonde girl and he has sex with the black haired girl but its quick in one scene shows a girl thrusting a guy on a bed forcing to kiss him but he slaps her on the face

one of the women ties the man to the bed and then thrusting on him and she almost raped him and she is saying f* me daddy 5 times and he slaps

The film also features some nudity as seen in a scene where the two women press their bare breasts and bare buttocks against a glass door (partial frontal female nudity) in an attempt to distract the male protagonist, and some rudimentary depictions of male genitalia as seen on various sculptures, as the two women try to vandalize them. No lower body male or female nudity is shown.

There are several prolonged dialogues about and mentions of sex throughout the film.

Some of the stronger scenes of violence in the film include one where a woman stabs the male protagonist in the shoulder with a fork, as well as a scene where the two women tie up the male protagonist and interrogate him.

The film also features strong coarse language, such as the expletives 67 'f**k words 'motherf**ker' and 5 'c*nt' as uttered by the main characters, usually in an aggressive manner.

In the beginning a character is seen drinking wine.

A man is about to light a pipe, which is implied to be filled with weed, but he is interrupted.

A woman tells her husband not to smoke weed.

A man throws away a cigarette.

One of the female characters smokes cigarettes on several occasions throughout the film.

'Knock Knock' is a thriller about a married man who becomes a captive in his own home when he lets two nubile female strangers into his house on a rainy evening when his family is away.