Buried in the statistics is information about who is participating in the hookup culture more or less actively. And, it turns out, not everyone on campus embraces the scene equally. Only 14 percent of students hookup more than 10 times in four years and these students are more likely than others to be white, wealthy, heterosexual, able-bodied, and conventionally attractive, according to quantitative studies of hookup behavior. Students who do not fall into these categories hook up significantly less and are more likely to disapprove of or be uninterested in the whole endeavor. To give you an idea of why, I’ll briefly discuss what we know about the attitudes and behaviors of African-American versus white and working-class versus middle-class students.

African-American students are less likely to hook up than white students. Sociological studies suggest that lingering racism plays a part: Black people have been traditionally stereotyped as hypersexual (trigger warning: see the “jezebel” and “mandingo” stereotypes). So, for black men and women, embracing sexual freedom can bring individual rewards, but also risks affirming harmful beliefs about African-Americans. In response, some black people feel the need to perform a politics of respectability. Rashawn Ray and Jason Rosow, for example, in a comparison of black and white fraternities, found that black men’s resistance to negative racial stereotypes sometimes involved being “good” and following mainstream social norms of appearance and behavior…

In contrast, poor and working-class students tend to take college much more seriously and don’t take for granted that they’ll finish, so they party less. They also tend to have less grand plans for their career (graduating can already seem like a major accomplishment) and imagine starting a family earlier. Investing in a serious boyfriend or girlfriend is more in line with these goals.