The world has many difficult questions, but this is easily answered.
In our world,we see many illusions, and "the banana" is one of them. Our mind can trick us into seeing either what the heart truly wants, or what mind fears the most. For example, I see and hear magoes all the time, but can never fully enjoy their taste, because they are fake.
Bottom line: BANANAS AND MANGOES ARE FAKE! , but Batman is not.