I study body language so I can trust people better and this just totally jumped out at me.
Out of many many types of body language this one particular type seems to be incredibly related to my picking. I do all the things on this list all the time.
Hey maybe we just need reassurance and it will all be solved.
Need for reassurance:
clenched hands with thumbs rubbing
hand pinching sucking on pen, glasses, etc.
touching chair before sitting
hand to throat (women) often displaced to seemingly checking to see if necklace is still there