We often preach the first beauty commandment , Thou Shalt Not Go To Bed Wearing Makeup. But have we been placing too much importance on our faces, while overlooking the biggest bacteria-harboring body part of all — the belly button? According to Teen Vogue , maybe. Sure, everyone has neglected the area at one point or another. And perhaps a build-up of lint is normal. But it turns out these body holes are huge breeding grounds for yeast and gunk if not properly cleansed. Teen Vogue asked dermatologist Susan Bard , M.D., about this surprising revelation. Apparently, leaving these small passageways untouched can potentially lead to an offensive smell or — worse — an infection. How dare we not take care of our innies and outies? Well, the madness stops here. Consider our priorities changed. You better believe all those Q-tips we don’t use on our ears — sorry, but it's really hard to remember — will be dedicated to swabbing our belly buttons daily.