Back when I was a kid, it was a routine - fill a little dishpan with water, and sit out on the back patio with it and a little brush, wash your feet before coming inside for the evening.

I'll bet that doesn't happen much anymore...

I haven't gone barefoot for any length of time for decades now. I have been wearing some sandals with a much thinner sole though. And I've been hearing about the benefits of "grounding" - i.e. feet in contact with ground, regularly.