Hi Roberto. Well there's disgusting and DISGUSTING. I walk around in the corrals all the time barefoot thru horse crap both gushy fresh and dried and it's no big deal. Never gotten sick and I can hose off or walk thru the creek. But walking around in a public restroom near the urinals or in the stalls I would rather not do barefoot or in an auto shop or anywhere theres grease cuz that aint coming off that easy. You were mentioning walking around cities in Australia barefoot. I lived on the streets in LA for a while and spent much time walking barefoot but I can remember spending a lot more time than I wanted to constantly looking out for broken glass, chewing gum, spit, etc. etc. The countryside is definitely cleaner and more user friendly than city streets.

As a teenager I jumped over a stile on a country hike and found both my feet in what was left
of a dead sheep.GROSS! Didn't do my feet any harm though,thankfully...