Carolyn
In my bad ol' drinkin' and smokin' days as a Thoroughly Wild Thing, I nearly always went barefoot. Could snub out a lit cigarette butt on the bottom of my foot, and often did.
As a child growing up in small towns on the coast, I was pretty much always barefoot, even in the rain. Climbed all the way to the top of 575-foot-high Morro Rock barefoot -- barefoot was the only way to go; you have much better climbing grip. The only time I wore shoes as a kid was when I had to. My feet are very healthy, no fallen arches, no corns, no bunions, no ingrown toenails. I will say, though, that going barefoot on concrete is the one thing I never could tolerate for long. Barefoot works for asphalt, dirt, grass, gravel, sand -- but not concrete for any extended period of time.