It fulfills a few needs: retail therapy, turns boredom to fun, and gives me ideas for the future (when I have money).
If you guessed that I more than likely just did this tonight, you are right. I just spent an hour on the Victoria's Secret website. Here's what was in my shopping bag before I hastily clicked the little x (aka saved myself $400):
(I still really want this. I may actually go back and purchase it)