These surveys come up with any kind of answer they want. I remember the "sexual violence" surveys they did many years ago when I was in college, where answering "yes" to any number of things like being touched unwantedly or pestered by someone of the opposite sex caused the report to count you as a "victim of sexual violence." Obviously that leads to headlines, followed by grant requests.

The article notes that student behavior does not match the label: "bisexual identification outstrips bisexual sexual activity." The universities are clearly indoctrination centers, but you don't need a survey for that.