Savage Streets. It's nowhere as graphic as some of the other ones out there, but the look on the girls face when he lunges forward and splits her cherry was hot.
Flesh and blood. Again, not as much shown, but the look on her face and the noise she made when he split her cherry was hot.
Last exit to Brooklyn. Everyone focusses on the gang rape at the end, but that was borderline consensual and she was too stoned/drunk to be feeling it anyway, but to me the best part is near the beginning. A man's wife starts coming on to him, and instead of making love to her, he violently rolls her onto her back, and then without any preparation or foreplay (ie she is neither loosened or lubricated) he rams himself into her dry, and by the look on her face and the way she screams she was pure agony. Then he rams away savagely again and again until completion, and each thrust is matched with a scream of pain and her face scrunching up as she tries to cope with the agony of having her cunt dry raped and scraped raw. Just thinking of that scene gets me excited.