A new study on the "self-reported sexual behavior" of college students offers some troubling results, WORLD reports. The study, by University of Portland professor Michael Monto, compares the sexual behavior of students who attended college between 2002 and 2010 with students who went to college between 1988 and 1996. About 59 percent of today's students say they have sex at least weekly. That compares to 65 percent of the earlier era's students. About 77 percent say they have had a "regular sexual partner" in the past year. Today's students are also more likely than their predecessors to have had sex with a friend, casual date or other non-regular partner in the past year as compared to college students of the past, by a small but significant margin. Self-reported sexual behavior from teenagers is notoriously inaccurate, and this study has not yet been peer-reviewed.