 Why does this keep happening to people? Seriously, it's because roaches are specifically attracted to fatty acids in our earwax, as well as dark humid places. And when they crawl in there to have a snack, well, we all know what happens next. This doesn't have to be you, though. Reduce your risk by keeping your sheets super clean, including never eating in bed. And if you go camping this summer, maybe just pack earplugs.