Oh my goodness, you guys have got me going with this now, lol. I love movies. Okay, here's a couple more:
1) Mickey Rourke and Lisa Bonet in
Angel Heart.
WARNING: Seriously weird-but-strangely-hot stuff ahead. Chicken blood is involved. And they even cut out the weirdest part at the end where he chokes her to near unconsciousness. No, seriously. You've been fucking warned. This movie is just twisted in general for other huge reasons, but it's such a good film. (Sorry, couldn't find it on Youtube, I hope it's okay that I linked to it somewhere else).
2) No votes for Terminator??? Awww,
Kyle Reese and Sarah Connor have one of the best love stories ever! Doesn't Kyle deliver some of the most romantic lines in all movie history?: "John Connor gave me a picture of you once...." "I came across time for you, Sarah. I love you. I always have." (*swoon*) Found the full scene at Dailymotion.
Also, this is maybe a bit OT, but Chloe Sevigny sucked some dude off for honest-to-goodness-real in Brown Bunny, yet she is still considered a mainstream(ish) actress. Does that film count as porn? Erotica? Neither? Hmm...
I can think of a couple more, but they're really dark. Not sure this thread's ready to go there, haha!