The biggest roadblock to any project like this is getting freshmen to speak honestly about what they know, don't know, and want to know. Sex is embarrassing enough to talk about with your friends (speaking from experience), let alone strangers, and finding volunteers may be challenging.

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Teenage years can differ dramatically based on any number of demographic variables: a working-class Caucasian from western Illinois will likely have a very different experience than a wealthy Latino from southern California.  This can result in significantly divergent levels of health literacy and exposure to sex education across the target population.