That's some excellent advice. Yeast infections can actually be life-threatening in some cases, not to mention the fact that fungus tends to have a terrible stench. Needless to say, that's a huge turn-off for most. The human body contains many warm, moist areas. The fungi thrive in such conditions.
As for yogurt, that is one of the best foods a person can eat. The active cultures can prevent a terrible infection called C-Diff. C-Diff is in the lower GI tract and is often caused by powerful antibiotics destroying all but one of the natural flora. Eating yogurt while taking IV antibiotics should be part of hospital protocol. Unfortunately, it is not.