1 I love the song
2 Regarding the meaning (from Wiki):
On the band's official website, the biography section states that Flowers is singing "Are we human, or are we dancer?" and also says that the lyrics were inspired by a disparaging comment made by Hunter S. Thompson, where he stated America was raising "a generation of dancers". In an interview with Rolling Stone, Flowers said that he was irritated over the confusion about the lyrics and also that fans were unhappy with the song's dance beat: "It's supposed to be a dance song, [the beat] goes with the chorus...If you can't put that together, you're an idiot. I just don't get why there's a confusion about it."
3 I've wanted that fucking jacket with the feathers since I first saw it. If I can't find one, I'm just gonna have to make one myself!