No, I'm not talking about pr0n or skinemax flicks...pervs.

I finally saw Y Tu Mama Tambien last night, and thought it was a really good movie dealing with human sexuality. Besides having hawt sex scenes, I thought it had some realistic takes on sex and sexuality. A couple of other critically acclaimed films that deal with the topic of sex are:

Sex, Lies, and Videotape
Eyes Wide Shut

There are many more out there, but I am interested in hearing what your favorites might be.

Sex and Lucia (Lucia y el Sexo)

If it qualifies, I would say Basic Instinct.

Brilliant film!

now does something like embrace the vampire and the poison ivy flicks count? since they were released by a major studio, and contain big stars?

L'Age d'Or

American Pie

I guess they count. They kind of fall into the Skinemax catagory though.

Rules of Attraction

Rules of Attracion

Came in here to say Rules of Attraction as well... :/

Ok - how about...

40 Days and 40 Nights
Virtual Sexuality
Orgazmo

Does Crash count?

Crash definitely counts. There are no wrong answers, although "American Pie" and "Orgazmo" aren't exactly the kind of film I was thinking of. Do they really have something to say about human sexuality and interaction? I mean, the topic of Stifler's mom isn't exactly grounds for intelligent discourse.

Pimps Up Hoes Down

Another vote for Sex and Lucia here, as well as Swimming Pool.

Carried Away (1996) with Dennis Hopper and Amy Locane. Where's the DVD?!?

Damage (1992) with Jeremy Irons and Juliette Binoche.

Thief of Hearts (1984)

Pretty Maids All in a Row (1971) with Angie Dickinson. Again, where's the DVD?

Just because a film's tone is satirical (Orgazmo) or irreverent (American Pie) doesn't mean there is no appreciable insight.

Everything You Always Wanted to Know About Sex * But Were Afraid to Ask

I am Curious C/C.

Nekromantik

I don't watch "sex movies", but I saw the Diabolical Adventures and had never laughed so hard during the infamous farting scene.

I've never heard of the movie and figure I'll probebly never see it. Would you mind elaborating (in Spoilers). I'm kind of curious about an 'infamous fart scene.'

Here are four from a the 70s / early 80s:

The Postman Always Rings Twice (1981)
Body Heat (also 1981)
The Last Picture Show (1971)
Looking for Mr. Goodbar (1977)

My favorites (including some already listed) would have to be:
Body Heat, Y Tu Mama Tambien (unrated version, of course), and Kika (sex in a funny sort of way, a Pedro Almodovar movie, not my favorite Almodovar movie but the one that fits the "sex" category pretty well).

Debbie does Dallas!

Classics:

Belle de Jour - Catherine Deneuve

And God Created Woman - Bridgette Bardot

Barbarella - Jane Fonda

Pauline at the Beach - Arielle Dombasle

Others:

The Lover - Jane March

9 1/2 Weeks - Kim Basinger