This is the story of my eldest daughter and a blanket that she’s had forever. It’s an old Indigo blanket. The kind that’s rolled up in a fleecy log near the checkout and you, like fifty thousand other germy consumers, absent-mindedly run your fingers along it and think to yourself, “This is nice.” It’s the kind of purchase that makes sense in a compulsive way, when you don’t know anything about it other than it feels soft when rolled up like a burrito in the impulse-buy line. It’s awful. My…