harrigran I do the same - it's one reason I wear a scarf of some kind!
phoenix so do I - always have.
And I don't doubt that the vast majority of the population don't bottle-wash. But, as you will meet very few who include it in the course of conversation, you're unlikely to know exactly how many do do it 
I think there should be some mechanism which prevents users of public loos from leaving the facility until they've washed their hands properly. Maybe a scanning device which detects numbers of fecal bacteria remaining on hands....? :D
So Many Exercises, I Only Need 3





