Do you have a favorite Christmas memory? I revisit mine every Christmas morning, and each time, it reminds me what great parents I had, a childhood charmed. As it turns out, or at least as I turned out (not so terrible, if I don't say so myself), modest indulgence of one's children doesn't ruin them. I was a one-big-thing kind of kid. Many of my friends produced annual litanies of Christmas wants, long lists for Santa well beyond the believing years. My style was to hold out for a single, impossible gift. "What do you want for Christmas this year?" Mom would ask. "All I want is _______________." When I was seven it was a horse, of course. "Where are we going to keep him?" Mom asked. "In the garage?" My second-grade brain imagined that as not such a bad place for a horse to live, and dad would no longer have to mow the lawn and we never parked the cars in there anyway and I'd take care of him, I promised. Each Christmas the...