1.   After Primo bends down and scratches her head, she walks over to the mailman and sniffs his foot.

2.   As we nestled over a bedtime story he scratched his head.

3.   Bob scratched his head thoughtfully.

4.   Budget directors are scratching their heads about how to deal with the shortfall.

5.   Everyone was scratching their heads trying to explain it.

6.   He sat scratching his head, trying to think of the answer.

7.   He sat thinking, scratching his head.

8.   He scratched his head and started looking through the drawers again.

9.   He scratched his head, a sure sign of thought.