Lyric discussion by Reasonless 

I take it to be about an ex-girlfriend moving on while he still has feelings for her. He wants to wake up to pictures of her, so he can pretend that they are still together and in a happy relationship.

Dog whistles are whistles that emit frequencies only audible to dogs. Often, they are used to train dogs. Basically, this line is saying that she still has this unique hold on him, even though he's alone and she's off somewhere else. In addition, he's overanalyzing things (attempting to read flashes of light as morse code messages).

This mindset leads him to interpret an email she sent in which she says "I was sorting some things out" as her meeting someone new. He imagines (note: "she's probably with a few of them right now" this isn't actually happening) she is developing feelings for a new man ("smell plastic burning, smell chemicals breaking down" chemistry is building between her and the new man) who will be the new person to be under her control ("he will be able to hear her dog whistle").

I get the feeling that he was the one that broke up with her. When Brian is picturing his ex with the new guy, she seems pretty down herself. Perhaps this is why there is "no place in between for them to meet." When they are together and Brian is happy, he doesn't want her. But when he is sad, he feels he needs her.

I think this is their best song. Very dancy, with somber yet (at times) humorous lyrics.

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