I used to have a hell of a lot of fun with 'im. Used to play jokes on 'im 'cause he was too dumb to take care of 'imself. But he was too dumb even to know he had a joke played on him.
Chapter 3 · George Milton
Context
Speaking under Slim's God-like gaze, George admits to a past pattern of exploiting Lennie's cognitive limitations for amusement, before describing the Sacramento River incident that ended this practice.
Analysis
The repetition of 'too dumb' across three clauses, with the joke folding back on itself—Lennie was too dumb to know he was the joke—creates a recursive structure where cruelty becomes invisible to its victim and therefore frictionless for its perpetrator. The past habitual tense ('used to,' 'used to') marks this as a closed chapter, but the confessional register suggests it isn't: George is still benefiting from Lennie's incomprehension, just in subtler forms (the rabbit promise, the unrepeated story of George Milton's mother).
How to Use in Essay
Argue that George's friendship with Lennie is shadowed by an unresolved exploitation he has refined rather than abandoned—this admission complicates any reading of George as Lennie's pure protector by exposing the asymmetry of consciousness on which their bond depends.