A couple of years ago, I happened to mention to a friend on a commuter train that my husband and I were going to visit a couple we know who spend winters in California and that we thought it would be fun to bring them each a Patriots sweat shirt. He asked, “Are you getting them a 36 or a 38?” I replied, “No, we’re getting extra larges.” It didn’t occur to me until I got in my car that he was asking about which Super Bowl shirt I was buying, XXXVI or XXXVIII.