I'm not going to use the whole "straight boy singing" thing because I find it quite HASHTAG PROBLEMATIC, particularly given the blurring of the lines in a post-Sam Smith, boring singer-songwriter world. I think the term is as unnecessarily reductive as thinking "gay singing" is Freddie Mercury strutting around in a feather boa.
I normally wouldn't lower myself to indulging in BGT-related shite but I like that he went in there singing the original lyrics, even if he's not bent or whatever. It was a really original song choice and quite refreshing from the usual "hide the gay references unless it's Diva Fever" style of The X Factor.