Sometimes you just have to beat the crap out of chlamydia with a condom to understand that sex-ed is in need of a major overhaul. Peiying Feng knows this. A 25-year-old design and technology student, Feng invented an app — ‘Tap That’ — to teach young people about safe sex in a way that’s humorous, approachable and above all else, run on a medium that they’re already used to — a cellphone. The app features different characters navigating multiple sexual relationships while trying their best to dodge sexually-transmitted infections (STIs). In short: college. If your character gets an STI, you have to use…

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