—Staff writer Matthew Q. Clarida can be reached at matthew.clarida@thecrimson.com. Follow him on Twitter @MattClarida.
—Staff writer Nicholas P. Fandos can be reached at nicholas.fandos@thecrimson.com. Follow him on Twitter at @npfandos.
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The interactive feature accompanying this article has been revised to reflect the following correction:
CORRECTION: Sept. 8, 2013
Due to an editing error, a graph in an earlier version of the interactive feature accompanying this article incorrectly stated the percentage of respondents who reported having had sex. In fact, that figure was 35 percent, not 65 percent.