Michael's "pacifier"

So, Michael has found a way to self soothe. Some kids suck their fingers, some suck their thumbs, others cling to a blankie or stuffed animal...Michael sucks his lower lip. I found him doing this one night after he had gone to sleep, then I noticed him doing it more and more throughout the day. I think its pretty cute, but sometimes I worry that it will be a habit we will have to break later on. Oh well, if it makes him happy, I'm fine with it. The really cute thing is when he runs his fingers through his hair and sucks his lip when he's starting to get really tired. Some day these baby things will be gone, so we might as well enjoy them while they are here.