It is probably the case that the prevalence of sexual assault on college campuses is wildly exaggerated—not necessarily in absolute terms, but relative to the rate of sexual assault among college-aged women with similar demographic characteristics who are not attending institutions of higher learning. The DoJ hints at this in its criticism of survey questions, some of which define “sexual assault” so loosely as to include actions that “are not criminal.” This might explain why so many women who answer survey questions in a way consistent with their being counted victims of sexual assault frequently display such a blasé attitude toward the events in question and so rarely report them. As the DoJ study puts it: “The most commonly reported response — offered by more than half the students — was that they did not think the incident was serious enough to report. More than 35 percent said they did not report the incident because they were unclear as to whether a crime was committed or that harm was intended.”
If you are having a little trouble getting your head around a definition of “sexual assault” so liberal that it includes everything from forcible rape at gunpoint to acts that not only fail to constitute crimes under the law but leave the victims “unclear as to whether harm was intended,” then you are, unlike much of our culture, still sane.