HERE ARE SOME BEST +18 MOVIE YOU SHOULD WATCH
So here is the list of best 18+ movies which you would like.
1. Basic Instinct 2

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It is the best adult movie in which a novelist Catherine Tramell Caught in the trap of crime and law. There is another character Scotland Yard who appoints psychiatrist Dr. Michael Glass to evaluate her. Just like Detective Nick Curran, psychiatrist Dr. Michael Glass is also quizzed by Tramell and tempted into an enticing game.
Votes: 36,083 | Gross: $5.97M
Length: 114 min
Director: Michael Caton-Jones
Stars: Sharon Stone, David Morrissey, David Thewlis, Stan Collymore
2. Caligula (1979)

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This movie shows history and drama. In this movie, there is a description of the graphics, shocking and tragic but indisputably bad story of Caesar, Gaius Germanicus Caligula (Malcolm McDowell) of Rome.
Votes: 32,243 | Gross: $23.44M
Length: 156 min
Director: Tinto Brass
Stars: Malcolm McDowellPeter O'Toole, Helen Mirren, Teresa Ann Savoy
3. Unfaithful (2002)

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This movie contains drama, romance, and thriller. It is a story of a NewYork stubborn couple. And how they move into a dangerous way because his wife started adulterer things.
Votes: 76,048 | Gross: $52.80M
Length: 124 min
Director: Adrian Lyne
Stars: Richard Gere, Diane Lane, Olivier Martinez, Erik Per Sullivan
4. Original Sin (2001)

Image Source - IMBD
This movie has mystery, romance, and drama. In this movie, A man and woman planned to rob a rich guy. So she makes sure that she loves him and she earned his trust and got married to him. Everything was going right to the plan until she fell in love with him.
Votes: 51,928 | Gross: $16.25M
Length: 116 min
Director: Michael Cristofer
Stars: Antonio Banderas, Angelina Jolie, Thomas Jane, Jack Thompson
5. Nymphomaniac: Vol. I

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This movie is the most prominent example of drama. This movie relates to the woman. She tells her erotic moments and experience to a man who was saved by her by beating.
Votes: 111,437 | Gross: $0.79M
Length: 117 min
Director: Lars von Trier
Stars: Charlotte Gainsbourg, Stellan Skarsgard, Stacy Martin, Shia LaBeouf
6. Sex and Lucía

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It is a movie which has a lot of romance and drama. Different lives converge into separate islands. A local writer connects all the people living on the island. The writer is also connected to his novel directly and powerfully.
Votes: 33,892 | Gross: $1.49M
Length: 128 min
Director: Julio Medem
Stars: Paz Vega, Tristán Ulloa, Najwa Nimri, Elena Anaya
7. Monamour

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This movie relates to the drama. In this movie, a housewife has an affair on the backside of his boring husband. Now she has different kinds of fantasies, which she uses to fulfill by another man.
Votes: 4,187
Length: 104 min
Director: Tinto Brass
Stars: Anna Jimskaia, Riccardo Marino, Max Parodi, Nela Lucic
8. Y Tu Mamá También

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This movie is full of drama; this movie shows that there are two teenage boys and a fascinating older woman. They all go on a trip. During their journey, they learn about the life, sex, and friends. And one more thing they learn one or more than two items from each other.
Votes: 110,385 | Gross: $13.62M
Length: 106 min
Director: Alfonso Cuarón
Stars: Maribel Verdú, Gael García Bernal, Daniel Giménez Cacho, Ana López Mercado
9. Private

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This movie has drama and romance. It is a collection of six stories. Tinto Brass - The maestro of Italian erotica is back!.deceit, moon-shine, venture are included in FALLO.It is precisely the collection of six stories of joy and eroticism of the new age of the woman.
Votes: 2,240
Length: 90 min
Director: Tinto Brass
Stars: Sara Cosmi, Massimiliano Caroletti, William De Vito, Guglielmo Aru
10. Frivolous Lola

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This movie is full of comedy and romance. This movie shows the scenario of the 1950s in the countryside of Italy. This movie shows two-character Lola and Masetto, who are a young couple, have different views of having sex before marriage.
Votes: 2,954
Length: 105 min
Director: Tinto Brass
Stars: Anna Ammirati, Patrick Mower, Max Parodi, Susanna Martinková