Acting is a masochistic form of exhibitionism. It is not quite the occupation of an adult.

My dear boy, why don’t you try acting? (on the set of ‘Marathon Man’, to Dustin Hoffman, who had announced that he’d gone 3 days without sleep in order to ‘become’ his character.)

We used to have actresses trying to become stars; now we have stars trying to become actresses.

A professional amateur. (Marilyn Monroe)