1.   He rubbed his chin thoughtfully.

2.   He stood for a moment, rubbing his chin.

3.   Rip rubbed his chin, and noticed that he had a long, scraggly beard.

4.   Martin rubbed his chin meditatively.

5.   He rubbed his chin with his hand.

6.   The Commander rubbed his chin vigorously as an aid to thought.

7.   The Prince rubbed his chin.

8.   Michele rubbed his chin against the top of her head.

9.   Asked for hobbies, he furrowed his brow and rubbed his chin.

10.   Bill says, rubbing his chin thoughtfully.