Cam is emotional. What you call showboating, Cam calls celebrating. What you call sulking, Cam calls reacting. What you call cocky, Cam calls confidence. Cam is naturally emotional and he has no interest in hiding his emotion.
Why You’re Wrong About Cam Newton (And His Presser)
Scott Gustin
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Cam is an adult, and these emotions are not what is expected of adults, especially those in a position of leadership.

Restraint is what we expect from the truly great. He will never be such until he can show some.