chronic foot picking - just a weird habit?

Hi Everyone, I've picked the bottoms of my feet since adolescence (now in my 20s). I find that I pick usually when I am reading something or working on an assignment. It's strange.. I wonder if it's my way of expressing my anxiety, even though I don't "feel" it in my body. I also wonder if it's not really problematic, as long as it's not interfering with other domains of my life. It's screwed up, but sometimes I'll pick too much and then the bottom of my foot will be a little tender when I walk. I also am embarrassed about getting a pedicure unless I'm fairly healed up. I probably should be more disciplined about it, but I find if I use a pummice stone and smooth out the bottom of my feet, I then have nothing to pick! My bf has very dry feet.. he doesn't care in the least! I have this desire to .. pick HIS feet! He usually doesn't let me, which I can understand why.. do you pickers out there ever have a similar experience? My mom is a bit of a picker, too... more so around her nails and scabs. So interesting that there could a genetic component..