I never put much thought into the reason, but I think mine is similar to many others. Getting a new pipe makes me happy. I get that warm, giddy feeling when I get a new pipe that I have been eyeing. Its satisfying, but at the same time, its the same sense of satisfaction I get when I buy any thing else that I want. The unfortunate thing is that I have found the satisfaction to be some what of lie, because its fleeting. It always feels good for a period of time and then gradually fades away... which coaxes you into your next pipe purchase. Now that I am typing it out I think I just described addiction lol. Guess I am addicted.