I do this. (I suspect quite a few of us do this, actually.) I get totally hung up on one item - goodness knows it's something I don't really need. But it's just there, always on the tip of my consciousness, hanging out, pestering me. It's like a scratch you can't itch, so you can't get your mind off it and soon you can't think of anything else. You obsess over it, tell stories in your head about it (any of you read the "Shopaholic" books? Remember how she was always, "The girl with the green scarf?" Or "The girl in the lilac sandals?" Or whatever purchase it was she was trying to rationalize?), and then finally, cave and just buy it.
For a while, it was like a disease - there was always the next thing, and then the next thing, and then, yes, again, the next thing.
I've been relieved lately, to find that when I'm excited about or busy with other things - non-fashion-and-style-related things that I really love (oh my gosh, what do you do if fashion is your vocation?) - then I'm much less prone to these consumerist obsessions. I can honestly say I haven't had one in months - and aside from some J. Crew sweater-related indulgences back in December and a certain Christmas present I had to have, haven't been shopping a whole lot either.
But I gotta say, this bag is starting a carve itself a spot in my psyche and well...I kinda want to let it!
C'mon, 'fess up. What about you? What's your current obsession?