With Valentine’s Day on Sunday, it’s all hearts and flowers — and chocolates — right now. Here on the Vineyard, the chocolates are Chilmark Chocolates, of course. Like most of us, I indulge whenever I can. I know that First Lady Michelle Obama is speaking out these days about obesity, but her main concern is with children. Senior citizen that I am, I am relatively unconcerned about gaining weight. At least I was, until I went on a chocolate-eating binge last month in Belgium. I ate some pretty trendy chocolates.