Max & Thor Tickling George

"'Take this!'""'Stop it! Ape!! AHA!! Hohoho! He's tickling me, Ape!! Help!'"-Thor and George as George gets tickled

This page is a Q & A on Max and Thor's infamous moment where they randomly tickled George during their fight.

Why Didn't George Try To Get Away?
As you can see, George can move his arms, yet doesn't try to get away, despite begging Thor to stop, showing that the tickling is torturous. Why?