Lyric discussion by DeeWillDo 

I think this song is about two people who are in a relationship and one of them, the girl (since it's a guy singing the song), her personality is awful but that's what makes her attractive. Anyone ever heard about SPD? It's this personality disorder, people with SPD don't really find anything interesting and don't really have lots of emotions and stuff... and this coldness makes the girl attractive to the guy since he's willing to abandon his former habits and way of life (that's what I think he means by "desertion" ... and he says her version is the only one he "could ever subscribe to", he wouldn't do this for anyone else...). Maybe she tried changing, going to a shrink perhaps, was given some drugs ("so cute when you're sedated")... but it's impossible for her to settle with the guy and they can't have a normal relationship and this is expressed through the existence of two hundred of couches she has to choose from, all of her "friends" or maybe strangers, she doesn't really have or need a home since she is unable to care about anyone... but he understands it because he says "sleep tight" But then the second verse is much more bitter because the guy realizes what a fcking ordeal it is to be in love with someone like that and care about them, and he's like "this is actually really fun why can't you just enjoy it, everyone's having fun" ("You are the only person who's completely certain there's nothing here to be into, That is all that you can do") and he understands that it's the girl's personality, but it still saddens him when he realizes she won't consider whatever she's done with his life, how she's affected him, she won't ever think about it, she doesn't care at all, and so he's leaving her ("now there is this distance so...") and he knows she will continue just the way she's lived before. and the song ends with him trying to forget about her and at the same time take something out of the situation, but there's nothing he can do so he just leaves her alone.

and PDA refers to how she doesn't really act like they're together at all, maybe they're out and he sees all the couples holding hands and stuff, "public displays of affection", and then he looks at them two and sees how detatched she is from him, how different it is....

oh well that's what I think. ;)

I think PDA in this song means public display of aversion

i think PDA means public display of aversion

PDA I have always heard as public displays of affection... and Dee WillDo has an interesting theory.

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