In humans, however, the desire is more organized and has various manifestations. Wine connoisseurs collect vintage bottles. Scientists collect empirical data. A lady's man such as Casanova collected lovers. The rest of us horde a wide variety of other objects such as: magazines, tools, mugs, stamps, toys, antiques, recipes, coins, dust, paintings, postcards, books, fountain pens, match books, thimbles, and more. The list is nearly as diverse as people. As I used to move a lot and now live in a relatively small space, my energy tends towards gathering non-physical items. Computers have made the collection of ephemera possible due to the increasing capacity of hard disks. For example, I was just downloading music files this morning. It suddenly struck me that my mp3 and wma files exist only on my external drive. They are one of the few things of which I don't have multiple copies. Now, I have to buy a 2.5 portable drive. I need to back up over 50 gigabytes of music. To prove I'm in it just for the collecting, I know I'll never actually have time to listen to a great portion of the ten to twelve thousand titles.