Unlike Japan, where removing one's shoes when entering the home is customary, Hong Kong has numerous reasons for engaging in the habit.
The city has become much cleaner since I arrived, yet several common hazards exist onto which one could trod during any given day.
Keeping your eyes open will help you avoid most of them, and the list is disgusting — but then so is tracking even one of these into your living space:
Sometimes leftovers, other times part of a meal, plenty of grub falls to the ground, complete with sauce. Curried fish balls top the list.
I can't speak for the women's side, but men are pigs. Not all facilities have cleaning staff on hand to mop the floor.
Most often splashed beside public garbage bins, it can also be found in doorways and at building corners.
Impossible to see, but you know it's there. Watching someone pick and flick is evidence enough.
Despite the HK$1,500 fine, some folks fail to clean up after Rover does his business.
Judging by the flattened, black globs on the sidewalks, discarded gum is epidemic.
Again, hefty fine be damned, people still spit wherever they please.
Crushed and smeared by someone else's shoe.