Crash (1996)

James Spader (i.e. Robert California) and Deborah Kara Unger (of.. uh… Highlander III: The Sorcerer) are kinky poly Hollywood swingers. James crashes his car, killing a stranger, and the stranger's wife flashes a boob at him. This kicks of the kink to end all kinks, and it is shocking that David Cronenberg ever got funded again after making this.

Spader bumps into widowed wife Holly Hunter (i.e. Elastigirl) at the car impound, and they hook up.

Holly takes him to a performance of her friend Vaughan (Elias Koteas, i.e. the guy who looks like but is not the guy from Law & Order: SVU). Vaughan puts on illegal performances in which he and his stunt driver buddy recreate famous deadly car crashes. I want to be clear that everybody involved is sexually attracted to car crashes. And they're all bisexual.

Spader and Holly hang around, having sex in various car places. Spader tries to get his wife into having sex in cars, which she's only partially on board with. Spader also hangs around daily with Vaughan, who has sex with hookers in the backseat while Spader drives them around. Spader sleeps with one of their other friends.

The sex gets more intense and kinkier, and, while nobody says anything, a powerful anxious, jealous tension builds between all of characters.

Vaughan is crazy beyond just sexual fetishes, and starts hunting people and ramming their cars against their will. They maintain a friendship with him through this, but it's hard when your pal is both sleeping with and trying to murder your wife. Doesn't stop Spader from having sex with Vaughan, though.

They're saved from the hassle when Vaughan, seemingly intentionally, kills himself in a fiery car crash. But somebody has to fill the crazy hole, so Spader steps up and becomes the car-chasing asshole. He nearly kills his wife, and they embrace under the totaled wreckage of her car while wistfully dreaming of dying in the next crash.

The whole thing is very uncomfortable, and not because of the dumb car fetishes. The main trio – Spader, Holly, and Vaughan – do an excellent job of building an unspoken, unacknowledged interpersonal tension. They all seem to be both severely hurting each other emotionally, and simultaneously addicted to the pain. Which is, of course, mirrored in the physical damage they're picking up from all of these car crashes. Licking the sutured scar on somebody's leg is the physical manifestation of reveling in their pain, the same played out psychologically when, say, having sex with their wives in the back seat of their car while they drive in anxious silence.