What is one childhood habit that still comforts you even as you are older?

Well although I know it's kind of a bad habit it still helps. I, sadly, bite my nails. I know there are times when I can stop but if they're my nails I bite them all off.. But I usually only do it when I am very stress... Interestin enough there is always enugh time inbetween the stress and my nails growing out. Most of the time my nails do not look like if I bite them, they just look short.
  
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