Hey!

I just wrote a post about my own picking, and noticed no one ever replied to your question. My answer? Yep, I definitely seem to do it for reasons other than drugs or anxiety.

- most of the time it seems to be sheer habit - just walking past a mirror, or having short sleeves can cause it

- sometimes it happens when I'm very agitated emotion-wise (like sad, angry or worried)

- perhaps also out of boredom?

- lately I've been having a dark suspicion that it might have something to do with, somehow, affirming my own negative body view. Like: because I regard myself as not good-looking, worthless, ugly and unlovable - I somehow try to "create" this image for myself? To give myself a reason to say "see! I was right, I do look horrible!"
No idea, but it's a theory I've been thinking about...

hoping that answers your question