From Mick LaSalle over at SFGate.com:
Today we look at the great movie sex scenes, and what do we mean by great? Memorable. Favorite. Interesting. And what do we mean by movie scenes? Scenes from actual movies. Not porn. Mainstream movies that play in regular theaters.
I left most of the choices to you, the reader, and what you’ve come up with are mainly scenes with a serious erotic component, but usually with something more going for them, too. You’ve also come up with scenes that are memorable for their depictions of bad sex — either for the ways they reveal character or somehow become indelible because they are so memorably bad.