Clockwise (1986)

A brief streaking scene of a male student running from one building to another. Seen from the backside only.

A man asks whether "Little boys?" --- implying molestation --- is why someone is unable to be present. There's no other dialog about this and it would probably not be understood by the youngest viewers.

A older man and an 18-year-old girl spend most of the movie driving together, leading some people to believe they are lovers. Another scene sees the girl leads another older man into the woods, suggesting to him that she wants to have sex. She gets him to strip to his underwear. Three teenage boys are seen to be looking at a pornography magazine, there's a split-second view of one page of female frontal nudity. We can infer from phone calls and what certain people know that the 18-year-old girl has been having an affair with her another older man --- her music teacher.

A brief view of a policeman with a black eye. The protagonist vandalizes and non-functional public telephone.

One very brief scene of cigarette smoking.