Perhaps it was spending two years on Guam that got our girls in the habit of not wearing shoes. Our Salt Lake neighbors always gave us puzzled looks as our girls continued to venture outside in the chilly weather without shoes on. The habit has continued even into Arizona, despite the fact that it is like walking on a frying pan in the summer and there are a few other hazards here. Yesterday Lindsey "went for a walk down the street" and came whimpering home for this picture.
I remember my Mom painting my fingernails with some kind of putrid material to get me to stop biting them. Maybe cactus can have a similar function--