Notice that Charlie is sitting on one foot. He enjoyed sitting this way according to interviewers and friends.
“Sometimes he would sit, one foot tucked under him, slashing at the leather cushion with one of his limber bamboo canes, as if in an effort to whip out an idea.” –Harry Crocker describing Charlie sitting on a divan in his bungalow during a story conference, “A Tribute To Charlie,” Academy Leader, 1972
“At first he sat quite formally, both gray-topped shoes on the floor. As he grew more interested in the discussion, he curled his left leg up under him.” (Katherine Eggleston Roberts, “Charles Spencer Chaplin: What Makes The World Laugh,” Success Magazine, October 1925)