The man’s ‘ambiguous chin’ is an artifact of the blind drawing process. Lifting the pen point and re-placing it where one thinks it should go, doesn’t always work out on paper.  The  girl’s fingers are another matter. She brushed her hair with them briefly from time to time. I sketched the idea of her hands, not the hands themselves.

Trio: Girl With Fingers in Her Hair; Man with Glasses and Man with Ambiguous Chin
Pen and Ink Sketch
10″x8″ 111# Moleskin Journal