Everyone says it, and what's more, everyone means it. "I just need *insert longed-after pair of sneakers* and I'm done." No you're not. You're never done. Because the thrill is in the hunt, not the sneaker itself, and once you get that one last pair there's going to be another one last pair, and then another, and then another. Like a hobbit once said, the road goes ever on. Something like that anyway.
Every Time You Think You're Out, They Pull You Back In