Has “hooking up” become the defining feature of college life? Does everyone do it? Does everyone want to? Most research on hooking up has examined college students who live on campus, or nearby, and hook up after alcohol-fueled parties. For example, the Online College Social Life Survey (OCSLS) of 21 colleges and universities shows that more than 70 percent of students, overall, hook up at some point in their college career. Even so, new research from the University of Illinois at Chicago, a diverse urban, public university with more commuters than on-campus residents, suggests that college sex is something quite different for the typical commuting student.