The urge to spend

Why is it that so many hobbies revolve around buying things for the hobby? Are there any out there at all that aren't like that?

Knitters want yarn, patterns, needles, stitch markers, and more more more
Quilters want fabric. Lots and lots of fabric. Can you ever have enough fabric?
Stamping- omg, don't get me started.

Even my sports hobbies are easy to spend on- skating is a money pit, yoga classes are expensive, and it's just not the same at home. Plus all the cute clothes.

Why is there always an urge to buy?
This morning (and last weekend) I didn't buy more Wollmeise. I'm proud of myself for this, but I have a longing to get more. Why do I need more? I have so much yarn to knit up still. But I have project after project that I really want to do "next". The list of "next" goes on forever... but always there is something new to buy.

Yesterday I cast on for a pair of socks (Mirror Mirror pattern) in Wollmeise 100%. I haven't used this for socks and am a bit worried it won't hold up as well as the 80/20, but my other 100% merino socks seem to be doing fine. I love this fuschia color. I had tried to do "Hearts Afire" in it, but I hated every second of knitting that pattern, and decided to frog after I put the heel on just a little too late and they were too long. I'm on the heel of MM now, hopefully it's in the right position. I hate toe up- it's so hard to tell when to start the heel. Additionally, I'm giving this a go on 2 circs, and it is NOT for me. I keep switching to DPNs for awhile to give myself a break from wrestling the octopus of needles and cords. But I wanted to learn a new technique, so then I go back to 2 circs. I cannot believe people prefer this. Casting on with DPNs is ackward- but the knitting process here is crazy.