GREAT idea! I use to love the silks on my blankets even when I was in my teens. I'd still rub them between my fingers. Guess what I do now? I don't have any silks but I scrape my index fingernail across my thumbnail! Still a "habit" Drives DH nuts but I can't stop for some reason! And yes you are right, better than sucking my thumb! I use to do that too!