Yeah I've asked him many times too but I don't know, maybe the dark lyrics are difficult for him to sing or maybe the high notes he hits in the song are too straining on his voice? Either way, he's a singer, he should be able to sing his songs live so that can't be the reason? If he doesn't like the song I'd be shocked at his lack of good taste in music lol I'd prefer him to do the dance version live rather than acoustically on a piano though hmmm