You know, the ones that got you all turned on. Not necessarily sex scenes - I have used love scenes because sometimes you can have steamy, erotic scenes without actual lovemaking taking place.
I'll start:
Diane Lane in Unfaithful getting the shit banged out of her from behind had me wanting to screw anyone in the cinema who would take me right there.
http://www.celebritymoviearchive.com...movie.php/6107