You would be surprised at how many gems are carried on the soles of your feet.
Did you ever walk into a pile of dog shit?
Did you ever see someone spit, cough or sheeze? Most of the time, those gems make it to the ground relatively quickly thanks to gravity.
taking off your shoes makes so much sense in normal times, during covid times, it is really appreciated.
PS, Malvern would be considered Other Areas in PA