this is such a funny song to me. the concept makes no sense and is just kind of inherently ridiculous, but Kate seems to take it very seriously. it’s about a girl who goes to a dance, meets a charming man who’s super attractive and a great dancer, and then the next morning looks in the paper and sees the man on the front page. And what?! It was a picture of Hitler!

Hitler, who has one of the most recognizable visages of the 20th century…It brings up many questions. How does the main character not recognize Hitler when she dances with him despite that she clearly already has associations of Hitler being the embodiment of evil? Also, why is Hitler hot? Awfully suspicious, Kate…

after you listen, read the following quote from Kate about the song:

That’s a very dark song, not funny at all! (…) I wrote the song two years ago, and in lots of ways I wouldn’t write a song like it now. I’d really hate it if people were offended by this…But it was all started by a family friend, years ago, who’d been to dinner and sat next to this guy who was really fascinating, so charming. They sat all night chatting and joking. And next day he found out it was Oppenheimer. And this friend was horrified because he really despised what the guy stood for. I understood the reaction, but I felt a bit sorry for Oppenheimer. He tried to live with what he’d done, and actually, I think, committed suicide. But I was so intrigued by this idea of my friend being so taken by this person until they knew who they were, and then it completely changing their attitude. So I was thinking, what if you met the Devil? The Ultimate One: charming, elegant, well spoken. Then it turned into this whole idea of a girl being at a dance and this guy coming up, cocky and charming, and she dances with him. Then a couple of days later she sees in the paper that it was Hitler. Complete horror: she was that close, perhaps could’ve changed history. Hitler was very attractive to women because he was such a powerful figure, yet such an evil guy. I’d hate to feel I was glorifying the situation, but I do know that whereas in a piece of film it would be quite acceptable, in a song it’s a little bit sensitive.
(source)

For the record, Oppenheimer did not commit suicide…