Superman may have been the Man of Steel, but he had a tin ear. No musical ability whatsoever.
It hadn't always been that way. Back in his Superboy days, he had taken up the electric guitar. Speed metal took on a whole new dimension when Clark “Fasthand” Kent soloed. Hell, it had helped him get to second base with Lana Lang.
But then things changed.
It was a custom axe that did him in. He didn't see that the soundboard had been made entirely of kryptonite until it was too late. His musical sense never recovered.
Curse you, Lex Luthier!