Last week, to mark the International Day to End Violence Against Sex Workers, I went out Christmas caroling in the streets of London's Soho district with a bunch of hookers and their friends from the International Union of Sex Workers. The weather forecast had been promising "heavy snow" for days (in England that means maybe half an inch, if you're lucky) and, sure enough, as we hit the streets with Silent Night, big fluffy flakes started falling. Magic!