FEMINISTS aren't going to like "Basic Instinct 2" - not so much because it depicts violent sex, but because Sharon Stone's character likes it so rough. Stone even smiles after being nearly drowned by David Morrissey in a hot tub. The Women Against Domestic Violence group was already in a dither because Keanu Reeves told an interviewer he learned something filming a rape scene with Hilary Swank for "The Gift" - "that some of the ladies don't mind it . . . Hah, that's awful to say." WADV's Melissa Rimel told Playboy the remark made her "literally ill," and added, "Why doesn't someone educate that man? . . . women do not want that, nor do they like it." Wait till Rimel catches Stone's act. For Post critic Kyle Smith's take, see Page 41.