Is it normal to poke holes through blankets with all of your fingers?

I have had always wondered if I was the only one who pokes holes through blankets, couches, chairs (basically anything that is easy to get my fingers through)(once when I was 5 I got my finger stuck in the car seat belt metal hole and my mom had to get lotion to pry my finger out). I am so embarrassed. I tried to research my addiction on google and other web sites, but I have found nothing, I have been doing this since I was a baby. Is there a name for my behavior? Is it normal?