My husband doesn't understand why I "need" more than one sewing machine, or fabric other than the current project.
I tell him it's like his guitars: they each "play" a little different or have a special purpose. So, he has a couple of electrics, a few acoustics, high end, low end, accessories, magazines, he goes to guitar stores and shows. I ask him why he needs to have more than one pick, more than one sheet of music, etc. It's good to have a meaningful hobby, and it doesn't have it to be explained--or maybe CAN'T be! We like what we like.
We get your obsession. If it's a sickness, this is your support group!!