Most sexually harassing behavior is student-on-student. In "The Report Card on Gender Equity", by the National Coalition for Women and Girls in Education (NCWGE), it was reported that, of students who have been sexually harassed, 90% were harassed by other students. (NCWGE, 1997) And in their 2006 report on sexual harassment in higher education, the AAUW reported that 80% of students sexually harassed were targeted by other students.
One of the most common reasons reported for sexually harassing behavior is because the harasser thinks it is funny to do so. In their 2006 study, the AAUW found that this was the most common rationale for harassment by boys--59 percent used it. Less than one-fifth (17%) of those boys who admitted to harassing others say they did so because they wanted a date with the person. (AAUW, 2006) Other researchers assert that the "I thought it was funny" rationale is a fallacy, and the true reasons align more with that of a need to assert power and induce fear in others--more in line with bullying. These hazing behaviors develop in school, continue in high school and college, eventually moving into the workplace.
In late 2006/early 2007 a study revealed that more than 20% of all boys had been harassed by a female student. In 15% of all cases the girl admitted to sexually harassing the boy and asserted the reasons of "I thought it was funny" and "I'm not doing any harm, it's what he wanted". High schools are addressing this behavior.
Peer-to-peer sexual harassment is three times more likely than perpetration by teachers or other school faculty. Sexual harassment between peers may also be a result of students trying to conform to expected gender norms created by society. It can also be used as a tool for gender policing. For example, this could be seen if a male is exhibiting behavior not seen to peers as being masculine, so others may label him with homophobic slurs in order to reinforce gender conformity through a form of nonphysical sexual harassment. Students may exhibit, accept, or tolerate this conforming behavior as to not cause rifts in peer groups.
Developmental causes may also result in sexual harassment among students. Those who are unprepared to interact with those of the opposite sex, are unable to appropriately read social cues, or try to exhibit sexual interest in another while not understanding appropriate boundaries, may end up engaging in sexually harassing behavior.