This communal bacteria news comes courtesy of a recent study in mSystems, an open access journal published by the American Society for Microbiology. It compared bacterial profiles from 17 different spots on the human body for a group of cohabiting couples. Spots included the soles of the feet, the outer nostril, the eyelid, the bellybutton, the inner thigh, and the armpit. Thankfully the participants themselves did the swabbing, so the microbiologists didn't have to swab anyone's bellybutton gunk. This seems like a less accurate way to do the study, since the average person might not be a great swabber, but I suppose if I had to choose between wiping q-tips on strangers and just asking them to do it themselves I would probably spare myself too.