This study examined the prevalence and impact of student attitudes tolerant toward or supportive of sexual aggression including date rape on college campuses. Data for the study come from the 1985 and 1989 Freshman Surveys involving a total of 89,070 male and female college students. Among the findings were the following: (1) students who oppose sexual aggression are more likely to be female, have a high self-rating of academic and writing ability, and want to help others in difficulty; (2) students who are less likely to oppose sexual aggression tend to believe married women should not work, believe that college increases earning power, believe that homosexuality should be illegal, believe that marijuana should be legal, and are Roman Catholic; (3) encouragement towards competitiveness and limited exposure to diversity in others creates a greater acceptance of sexual aggression; (4) a partying lifestyle and being a college athlete adversely affect students' perception of sex; and (5) fraternities tend to support anti-woman, pro-rape attitudes, especially sexual aggression. (Contains 61 references.) (GLR)