https://www.ussc.gov/sites/default/files/pdf/news/congressional-testimony-and-reports/sex-offense-topics/201212-federal-child-pornography-offenses/Full_Report_to_Congress.pdf
Dec 31, 2012 — ... anal-genital, or oral-anal, whether between persons of the same or opposite sex”). 16 United States v. Williams, 444 F.3d 1286, 1299 n.62 ...