BIG PROBLEM! I have a thumb sucker on my hands! It's hillarious, but oh so bad. I tell her no no! (hence the nick name from her Grandpa Dave) and pull her thumb out of her mouth and stick her pacifier in. Well, she quickly yanks out the pacifer and there goes the thumb, right back in. I continue this cycle for quite a while. It's like she knows she is doing something naughty and gives me these looks of guilt. She's so my bundle of joy!