....wearing these (thongs) come with unhealthy consequences. You have a strip of material directly connecting the vagina and the anus. If the latter isn't spotlessly clean, fecal content and bacteria like E. Coli and group B strep typically found in the rectal area can be tracked into the vagina. Aside from border-crossing bacteria, the constant rubbing of thongs can cause perineal fissures - tiny tears between the rectum and vagina. Any open cuts in that area are potential sites for infection, including STDs.