Contestant couples perform on a game show where they are given random sexual challenges they have to pass. The winning competitors will take home $50,000.

One of the first documentaries produced about the then budding New York porn industry, Changes is a studious and at times humorous exploration of everything from live sex shows to gay liberation.

Rick and Angela, an extraordinary young married couple who are bored with mate swapping and orgies, decide to blackmail people into becoming their sexual slaves.

A professor has a new class of students, who are nearly as horny as he is.

Alex is tired of making love to his wife Pamela. He craves something new and exciting.

Large-breasted Terry has an affair with Victor, fiancé of her sister Claudia. However, Victor isn't quite the wronged fiancé, as it turns out that he's having an affair with a hot young thing. Further, Ada–Terry's mother and Claudia's stepmother–has a plan to terrorise Claudia out of her inheritance.

When oil is discovered in a small-town, some greedy prospectors hire a gang of wild bikers to scare the townsfolk away. However, when a group of young pilots stumble across the underhanded plot, they plan an effective retaliation.

A spaceship from another universe comes to the earth to conquer it. The alien's ship runs on sexual energy, so to power it and take over the world, they make sex slaves out of part of the population, then instigate a worldwide orgy.

Three lovely girls are abducted and forced to work in a Manhattan brothel.