Not long ago, I was riding the escalator up to the local subway station when I saw an ironic — but not very surprising — sight. I don’t know if it’s common outside of Korea, but around here, women who are wearing skirts — not even necessarily short ones — tend to hold their purse behind their legs, to hold the skirt down and, presumably, to fend off perverts trying to shoot upskirt images. (Yeah, it’s an issue here.) Well, on this particular day, a young woman doubtless acting on habit did exactly this. She slipped her purse behind her, …