Other peoples fecal matter will contain many forigen bacteria, and these microbes are proven to coat the hands of people after using air driers. My apologies about the sterile urine comment. Nonetheless, you'd be in a better situation with bacteria on your hands from your own pee vs from a strangers feces. One's apart of your microbiota, while the other is entirely foreign. IDK, I've seen many cases where washing your hands after a piss made no sense due to cleanliness issues or a lack of a sink and never heard anyone around ever having any issues. Yet many pathogens are spread via the fecal oral route. So I'll take my chances of maybe having some of my urine vs having someone else shit on my hands everytime in that situation.