It was a humorous way of replying that it is nearly impossible for him to forgo contemplating about his job .He was showing the person that it is necessary for him to tap his chin when he is in deep consideration about work .He was using his finger on his chin to count the weeks it had been since he had n't thought about work .None of the above choices .
Why was he tapping his chin in mock thought at the statement ?
Mostly , though , I was trying to distract you from thinking about work . " " Valiant effort , but quite a task to take on . The last time I did n't think about work at all was ... " He paused , bringing a finer to his chin to tap it in mock thought . " Three weeks ago . "