It's not exactly something pleasant to discuss, but it is an old time cure. I first heard of it from and engineer that worked at sea with me. He told me he learned it from his father in Mississippi in the 30s. And recently, I was watching an episode of Survivorman. He was deep in the Amazon (The Jungle not the online retailer) and had a nasty case of foor fungus. All I was thinking about was "take off those stinking boots and pee on your feet." Although I use and prefer chlortrimazole, urine works as a cure for fungus. See: http://chetday.com/blog/2005/01/urine-therapy-and-foot-fungus.htm; If I were out covered in sweat anyway, whats a little pee on your feet.