How can you get a yeast infection.
You can get a yeast infection from wearing your pants too tights, you can get one from having sex, from not washing regularly, or taking certain antibotics. Or you can simply have one from hormonal changes that occur, like before your period.
I read on this site that you can get a yeast infection if a guy eats you out and you aren't wet or something. dont listen 2 me, lol, I'm not exactly sure, I'm a little mixed up here.=D
Yeast infections usually happen when your body chemistry is out of whack. The wiki article as pretty good: http://en.wikipedia.org/wiki/Candidiasis
Well I know a lot of yeast infections can happen when one is taking an antibiotic. And I am not sure really how else you can get them :)
There is also a theory that a heavy sugar diet can contribute.