Oh dear. Was President Trump’s tweet of his head digitally added on to the body of Rocky Balboa/Sylvester Stallone rather too psychologically revealing? The image seemed to say everything you needed to know about Trump’s delusional self-image. Well, I say “needed”. How much does anyone need to know about any man – world leader or regular Joe – who mistakes male heft and musculature for true power? Before we begin, a minor quibble: the tan of Rocky’s body isn’t an…