Forbidden Love Game (1975)

In the opening scene, the male protagonist is briefly shown shirtless as he prepares for school.

Teenage girl and teenage boy are shown kissing. Both are wearing completely unbuttoned shirts and keep undressing (girl is briefly shown in panties, back-sided to camera). Later they are making love - only their bare backs and boy's sweaty bare chest are shown.

The Professor's companion Jaime is shown shirtless, as his master combs his hair. The scene has both sadomasochistic and homoerotic subtext.

A teenage boy and a girl wake up in the same bed, probably after having sex before. The boy is implicitly naked (with only the tip of the sheet casually covering his private parts) and the girl (in the covers up to her armpits) is leaning against his chest.

Despite being taken over by a sadist, the teenage boy and girl do not lose their sex drive. It's implied that they had sex in the basement and several more times later. The sex always takes place off-screen.

The professor with a cane in his hand orders Miguel the teenage boy to take off his pants and briefs. He does so and expects to be spanked. But the Professor just walks around and looks Miguel over and throws the stick away. He was all about sexual humiliation. The boy's nudity is not visible, only his clothed upper body is shown.

Jaime admits that he's sexually attracted to Julia. It's accompanied by a shot representing his POV, panning over Julia's bare legs.

A jealous nerdy classmate tells the police that Miguel and Julia ran away so they could "practice their sexual relationship" out of sight of their parents.

Jaime is shown shirtless with blindfold on. Miguel and Julia smash eggs on his head and half-naked body and all three are clearly having a good time.

A scene with sexual overtones in which a shirtless and barefoot Miguel is playfully tickled by Jaime (who is also shirtless) and Julia. It is a montage of close-ups of Miguel's laughing face, and his bare feet and armpits being tickled with feathers.

Shirtless Jaime and Miguel drip candle wax on Julia's bare back. She is eventually subtly shown completely naked - a few seconds of rear/side nudity and about a second of full frontal nudity. She clearly enjoys the whole process and undergoes it willingly.

Jaime and Miguel are shown shirtless and barefoot after a mutual fight. They treat their bruises with alcohol instead of disinfectant, then start drinking and laughing at the folly of their previous conflict. Finally, they are shown sleeping shirtless next to each other in the same bed. Presumably this means they've made up and are comfortable in front of each other again, not that they've had sex. But even that interpretation can't be completely ruled out.

As they get more comfortable in their new abode, Miguel and Jamie are gradually shown more often sloppily dressed - in wide open shirts (Miguel), tight undershirts (Jaime) or shirtless and barefoot (both).

The professor with a cane in his hand orders Miguel the teenage boy to take off his pants and briefs. He does so and expects to be spanked. But the Professor just walks around and looks Miguel over and throws the stick away. He was all about sexual humiliation. The boy's nudity is not visible, only his clothed upper body is shown.

All four main characters are shown holding a gun in various scenes. These are mostly firearms, which they use to threaten each other, but no one shoots anyone.

Professor hardly slaps his companion Jaime and encourages him to slap him back. Jaime punches him in the stomach instead. Both are then laughing about it.

Professor punches a teenage boy in the stomach. His companinon then threatens the boy with a gun.

Miguel fights with Jaime and threatens him with a broken bottle. Both escape more or less unharmed, with only a few scrapes.

Miguel punches the professor several times painfully in the stomach.

Jaime slaps Miguel so hard he knocks him down. Then the two fight on the ground.

Violence is one of the main subject matters, but its most common form in the film is a psychological one.

Not really, but it potentially depends on language version or subtitles translation.

The Professor, Jamie and Miguel are shown smoking cigarettes in various scenes.

Some wine drinking and later on drinking of probably whiskey from the bottle.

Many scenes in the film containing physical or psychological violence can be considered intense and frightening, depending on the sensitivity of each individual viewer.