i'm sorry i must of been mistaken when we covered female anatomy in my classes. i was lead to believe that a yeast infection was caused by a ph change in the vagina, occuring when a woman was on antibiotics resulting in a change in bosy chemistry, or even when a woman soaks to long in a bath. the vagina is a acidic level to kill any bacteria. anything to base like a bubble bath...causes a yeast infection, a bacteria buildup.
i was not aware a thong could do this. I'm guessing then that any underwear could in a womans case.