I lived in Java, Indonesia for a year and ran barefoot, and only wore sandals to the mosque. You wash your feet 5x per day for the 5 daily obligatory prayers, so it works out well. An earlier post here about a person barefoot in all seasons and on the subway train, well, that's another story. I grew up in Brooklyn in the 60s through the 80s, and I can't see that at all. But then again, NYC is a lot cleaner now than it was then. My foot spread out and feels so much more usable to grab at the trail and less stiff without pain. I started running barefoot in 2007, but not as frequent or as long as a competitive runner would; it was more of a 30-minute run 3 to 4x per week at a mild pace . I'm 60 now and have no back, knee, foot or other joint pain or soft tissue issues. I did run on the front of my feet, and with a bicycle pedalling type of motion of my feet. Now, I wear Xeros and a cheap rip-off of the Vibram minimal sole shoes for my daily town/city walking and running.

You do. Most barefoot folk I know thoroughly scrub their feet first thing when they get home in the evening.