This is a story I read about 10 years ago.
MC is a coed, she is smitten with a young college professor. After a passionate date, already in his secluded cabin, he confesses her that the only way for him to achieve orgasm is to snuff his date. He shows her a row of graves in his garden, all of them girls he snuffed. He gives her the chance to leave and she starts leaving, but then she sees him looking sad and dejected and decides to go back and be snuffed.
Does anybody remember this? TIA