Sigourney Weaver stripped to her knickers and shivering while she slowly avoids being seen by the Alien in the Escape Pod of the Nostromo.
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Shadow of the Pigeon -
Weirdo of the Night
Any of the scenes involving both Paul Newman and Joanne Woodward in The Long Hot Summer.
Ooh baby, Paul Newman does it for me!
Rather, I was in the position of a spore which, having finally accepted its destiny as a fungus, still wonders if it might produce penicillin.
–Ayi Kwei Armah
Lt. Frederic Henry.
Catherine Barkley.
You’re welcome.
“The world is everything that is the case.” --Ludwig Wittgenstein
You’re wrong. Those two are from A FAREWELL TO ARMS.
Robert Jordan and Maria are the characters in FOR WHOM THE BELL TOLLS.
The scene in “A Fish Called Wanda” where Jaime Lee asks Cleese if he speaks Italian and he does but then changes to Russian and she goes to pieces.
The part in “Bull Durham” when Costner has Sarandon tied to the bed and is painting her toenails.
Diane, why don’tja come and visit me? I’ve had a crush on you for months, XXOO,
Larry
I’m really thinking that we need to plan a SDMB orgy in the near future. 
Pardon me while I burst into flames.
Hurry, we have to have it before May27th…if you do, I am so there. 
And I agree with the Titanic scene. Very erotic. Rest of the movie sucked…