Costco has always been a mythical place in my mind. It was an amalgam of Home Depot, Target, Fred Meyer, the Home Shopping Network, the Mall, and everything else. What is Costco? It's where restaurants buy hundreds of pounds of toilet paper and fish fillets. Where parents buy a lifetime supply of diapers. Where membership feels like a gift. So I was overwhelmed when I went there. I bought Tillamook cheese, coke, nitrile gloves, and toilet paper.