In 2010, the CDC conducted the "National Intimate Partner and Sexual Violence Survey" (NISVS 2010) and published the results in 2011. From the introduction: "This report presents information related to several types of violence that have not previously been measured in a national population based survey, including types of sexual violence other than rape; expressive psychological aggression and coercive control, and control of reproductive or sexual health" [emphasis mine]. Why is this important? Because traditional methods of surveying or studying rape don't include male victims of female rapists (except in the cases of the woman using a surrogate penis to penetrate the man), because that's Not Rape.