On the chance it was just a fluke I thought I'd give it a go. Apart from having the shit Travis song I had to try the first link to the vagina smelling results.
http://answers.yahoo.com/question/index?qid=20120626205143AAzCSQi
"Thongs are terrible because the ride germs back and forth from the rectum right into the vagina and are very unsanitary."
It makes it sound like a carpool for bacteria.