Holden and Ackley do stuff to each other to drive the other person mad. Why do you think they do this? What does this suggest about Holden?

Ackley and Holden feed off of each other. Both boys are anti-social and exist outside of mainstream social circles. They reflect their own anxieties on to each other. According to Holden, Ackley is a supremely irritating classmate. Ackley sees Holden in a similar way.