I do that gesture when I'm in pain, having a conversation with someone and don't want the discomfort to show. It sort of relaxes the tightness of my mouth and jaw, keeping me from making a prune face.

There's also an accupressure point on the chin that helps with female things. I rest my index finger on it, with my hand in a semi-fist, with the thumb right under my chin. It's a much better option that rolling around in pain.

Is that a possibility?