I developed this habit, having barefooted steadily for 20-some years, of holding a lit match to my sole to see how a little flame feels on toughened sole skin (even, or especially, the instep). It's rather fun; I also use a small candle to feel the dripping hot wax. Idiosyncratic? Sure, but why not? We go barefoot, in part, for sensual satisfaction. This is one of them.
