UPDATED: September 5, 2014, at 1:44 p.m.

Part IV of a five-part series on Harvard’s incoming Class of 2018, based on data collected by The Crimson in an email survey conducted in the month of August. The complete series can be found here.

Thirty-eight percent of incoming members of the Class of 2018 surveyed by The Harvard Crimson last month reported having had sex before arriving on campus, a slight increase from last year’s class.

But analysis of the survey shows that final club and greek life hopefuls were more than twice as likely to have done the deed than those uninterested in those groups and athletes were significantly more likely than non-athletes to have lost their virginity.

Sexual habits and opinions were among a range of topics explored in The Crimson’s email survey of the incoming freshman class. The survey, conducted by The Harvard Crimson, was emailed to all incoming freshman on Aug. 6 and closed on Aug. 28. Of the 1667 students in the incoming freshman class, 1,172 responded to the survey, representing around 70 percent of the class. The survey was not adjusted for selection bias.

Exploring political opinions, drug and alcohol habits, sexual activity, and the role of technology, this installment of a five-part series on the survey’s results looks at how the newest members of the Harvard community live and view their lives away from the classroom.

TO THE LEFT

When it comes to political beliefs, Harvard’s incoming Class of 2018 appears to be decidedly liberal. A plurality of respondents identified themselves as ‘somewhat liberal,’ whereas only a combined 15 percent of respondents identified as somewhat or very conservative.

On specific political issues, a majority respondents also showed more liberal beliefs, with 58 percent of respondents favorably rating President Barack Obama, 83 percent favorably rating same-sex marriage, and 54 percent favorably rating a national minimum wage of $10.10.

Respondents appeared to be less sure about marijuana legalization, which was rated favorably by 50 percent of surveyed freshmen, and the Affordable Care Act, which was rated favorably by 48 percent.

When asked about their views on same-sex marriage, 83 percent of respondents said they have favorable views while another 9 percent said they had no opinion on the issue.

Men and women seem to have slightly different views, as male respondents were more likely than females to identify as conservative, and women on average reported have a higher opinion of President Obama than males. Only 11 percent of female respondents identified as somewhat or very conservative.

Though only 6 percent of freshmen identified as “very religious,” religious background correlates with political beliefs for the surveyed members of the Class of 2018.

Eighteen percent of respondents identified as Protestant, 19 percent as Catholic, 10 percent as Jewish, 3 percent are Muslim, and just percent 1.6 percen6 and 2.4 percent as Buddhist and Hindu, respectively. About 35 percent said they are either Atheist or Agnostic, while 10 percent choose the “other” category.

Though most demographic and religious groups exhibited strong support for President Obama, his signature legislative achievement, the Affordable Care Act, fared less well with certain groups. Thirty-six percent of Catholic respondents gave Obamacare favorable ratings, the lowest of any group. Among income groups, the highest levels of support for the healthcare legislation was concentrated in the middle income brackets.

Muslims, on average, were the least favorable toward same-sex marriage, with just 44 percent of respondents favorably rating it.

When it comes to the legalization of marijuana, Jews were on average much more supportive of legalizing the drug, and rural students were on average more supportive than their urban peers.

THE DRUG CULTURE, OR LACK THEREOF

While half of surveyed freshmen are in favor of legalizing marijuana, most do not use the substance.

Twenty-five percent of respondents reported that they had used marijuana, but only about 3 percent said they ingested the substance once a week or more. Overall, the higher a respondent's reported combined family income, the the more likely they were to have used marijuana. Less than one percent of respondents reported having tried cocaine or LSD.

Overall, respondents proved to be fairly abstinent when it came to participating in drug use, with an overwhelming majority of surveyed freshmen reporting to have never tried any drug harder than marijuana, and even more, 87 percent, saying they have not smoked tobacco.

Though respondents may cringe at the thought of lighting up a Marlboro Red, they appear to have fewer reservations about alcohol. Two-thirds of respondents have already had a first drink, with 39 percent of surveyed freshmen reporting that they have had a drink at least between once a month and once a semester.

Those who identified as white were most likely to have had a drink, with 70 percent reporting doing so. Students of Indian descent were the least likely to have reported having a drink, with less than half doing so.

Denomination aside, those who described themselves as “very religious” were the least likely to report having had a drink. Those who report being somewhat or very conservative are more likely to report having had a drink than their liberal counterparts.

Still, no matter how much they are drinking, this year’s respondents are probably not purchasing the alcohol themselves, as only 11 percent reported having a fake ID.

BETWEEN THE SHEETS

Though close to 60 percent respondents reported being virgins, men were more likely than women to have had sex. According to survey results, high family income and attending private school correlated strongly with increased sexual activity. Around 60 percent of varsity athletes report having had sex, compared to just 39 percent of non-athletes.

When it comes to religious groups, Jews reported being the most sexually active, followed by atheists and agnostics.

Respondents who indicated that they were “very interested” in joining a final club or greek organization were more than twice as likely to report having had sex than respondents who said they were “not at all interested” in punching or pledging.

The most common time to lose virginity among respondents was in either 11th or 12th grade.

International students reported having had more sexual partners than their American peers, with 66 percent of non-virgin international respondents claiming multiple partners. Rural respondents also had more sexual partners than city kids, with 63 percent of rural non-virgins claiming multiple partners compared to 46 percent for urban dwellers. Students who identified as homosexual on average reported having more sexual partners than heterosexul respondents.

APPLE NATION

If the Harvard freshman class were judged on its diversity solely by what type of computer its students own, it would not be very diverse. According to the survey, 71 percent of respondents own a Mac and 73 percent carry an iPhone in their pocket. The vast majority are also plugged into Facebook, with only 2 percent of surveyed freshmen abstaining from the social-media site. A slim majority also participates in Twitter, with 52 percent of the class having an account.

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When broken down a bit further, though, the apparent homogeneity is less consistent. While 77 percent of white respondents reported owning a Mac, only 58 percent of black respondents did. Income differences also revealed a disparity within the majorities—over 91 percent of the highest family income bracket reported owning a Mac, while only 57 percent of the lowest income group reported ownership.

The most common reported estimation of time spent on Facebook was “between 16 and 30 minutes.” Still, most respondents reported spending far more time studying.

—Staff Writer John P. Finnegan can be reached at finnegan@thecrimson.com. Follow him on Twitter @finneganspake.

—Staff writer Ivan B. K. Levingston can be reached at Ivan.Levingston@thecrimson.com. Follow him on Twitter @IvanLevingston.