I've overheard a very stupid argument about the first example I'm bringing up, so there are at least a couple of people who believe: that it's always white & also that a majority of "suspicious white stains" are actually semen stains ... no, dirty-minded people. This is NOT always the case! For example; did you know that sperm can be blue? Apparently whoever has such an issue needs a prostate exam ASAP, because it can spell trouble in that area! Also, why do filthy-minded people always like to assume that white stains are really "Big John's Jamba Juice" (to put it in a funnier but cuss-free way)?? There are hundreds of things that can explain/cause white stains; whether it's milk, cream, yogurt, cream-cheese, toothpaste, glue, Tipp-Ex, white paint, flour, ash, talcum powder ... & goodness knows what else! Sorry if I sound demented (LOL), but I honestly have tried to make a decent enough answer, so hopefully it's good enough for this post! Apologies if I've said anything offensive, as I truly don't mean to be... =o)