I like this list because it includes movies you don't usually see on these kinds of lists. From Moviefone.com.
24. Desperado (1995)
Few Americans knew Mexican soap star Salma Hayek before Robert Rodriguez cast her as a bookstore owner who helps a mariachi (Antonio Banderas) avenge the death of his wife. But no one could deny Hayek's ample talents (or bosoms) after the sexy, candlelit romp she shares with Banderas. Incidentally, we don't blame Antonio for forgoing blood-soaked vengeance in favor of some between-the-sheets time with salsa-hot Salma.
22. Young Frankenstein (1974)
Madeline Kahn, as Dr. Frankenstein's frosty fiancée Elizabeth, comes undone upon seeing the monster's (Peter Boyle) "enormous schwanstucker." She melts with his advances, breaking into operatic song at the climactic moment (or final-final moment of the seven or eight that the pair enjoy). Those white streaks in the bride of Frankenstein's hair? According to this comedy, they're caused by the ferocity of Frank's sexytime. It's alive, indeed.
17. Sex and Lucia (2001)
Paz Vega is a waitress who recalls the best moments of her ill-fated love affair with a writer, Lorenzo (Tristan Ulloa), in this Spanish flick. She was obsessed with him, and it shows -- she does a strip-tease for him, they fervently make love and she holds his, um, manhood ardently. Oh, this is why Vega is so popular in her homeland.
12. Coming Home (1978)
Uptight Army wife Sally Hyde (Jane Fonda) falls for paraplegic Vietnam vet Luke Martin (Jon Voight) in this anti-war drama that earned Oscars for both actors. He may not be able to walk, but in their classic sex scene he proves he can still please a woman, and how -- she has her first orgasm (ever!) with his, er, vocal encouragement. This is how most war veterans would like to be treated upon their return, we'd wager.
10. Team America (2004)
Leave it to South Park creators Trey Parker and Matt Stone to envision a marionette-on-marionette sex romp so vulgar that it had to be cut to avoid an NC-17 rating. Even so, these two dolls get it on in ways even the Kama Sutra never imagined, as well as the standard missionary, reverse cowgirl and 69 positions. But the best part by far: Neither puppet has genitalia.
9. The Unbearable Lightness of Being (1988)
Tomas (Daniel Day Lewis) is a Czechoslovakian man of many hats: He's a doctor, a philosopher, a playa. But nothing turns him on like a woman IN a hat, and Lena Olin may be the finest creature ever to don one on screen (a bowler hat, for sure) in the most memorable of many kinky scenes in this 1988 drama. No wonder Prague's become such a hot destination for travelers.
7. Unfaithful (2002)
It was a tossup with this one -- but after great debate, we chose the illicit bathroom tryst over the we-know-it's-over hallway encounter. Diane Lane as Connie Sumner and Olivier Martinez as Paul Martel steam up most of the flick; knowing that her ladies-who-lunch friends are waiting in the cafe while they're going at it in the bathroom stall is just too hot for words. Wait, there's one we can think of: Aahhh.
6. Secretary (2002)
Self-mutilating wallflower Lee Holloway (Maggie Gyllenhaal) and her controlling boss E. Edward Grey (James Spader) spend their office hours bonding, so to speak, in a sadomasochistic relationship that's as twisted as it is thrilling. But when Edward finally admits his love for Lee, bathing her in his tub and making love to her on a grass-covered bed, you see that their connection transcends spankings and dog collars. It's by far the sweetest moment in the history of S&M.
2. Body Heat (1981)
Double Indemnity and The Postman Always Rings Twice are undisputed classics, but let's face it, they're sorely lacking in strong sexual content. Enter Lawrence Kasdan's 1981 retooling of Indemnity, fittingly dubbed an "erotic film noir" (greatest subgenre ever?), a film that's steamiest scene found William Hurt breaking and entering into a seductively red-skirted Kathleen Turner's quarters before romancing her stone as a humid Florida night gets even hotter.
(See them all at Moviefone.com)