A man and two women are seen in the shower together. Breasts and nipples clearly visible.

A girl speaks to the protagonist as if he was her father and yells at him after accusing him of sexually assaulting her when she was a little girl.

Two women put their bare asses up to a window.

A man and two women are briefly seen having sex behind a frosted panel in the shower (very blurred).

Two women press their bare breasts and bare buttocks against a glass door. No male nudity. Some rudimentary depictions of male genitalia are seen on various sculptures. No male or female genitalia is shown during movie.

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.

107 uses of the f-word 12 uses of sh-t 1 use of c-nt 6 uses of b-tch 5 uses of a-s 3 uses of h-ll 3 uses of d-mn 3 uses of c-ck 2 uses of d-ck.

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.