This song is about a few different things but a couple of them appear to be the interdependent facts that people just generally need each other and having each other's company can be both comforting and arousing -- and then the matter of choosing who to be with, and then once two people have chosen each other, whether he/she is really the "right" person for me, and whether I'm the right person for him/her. The verse about "vulgar electricity" seems to be about all of this, including the ongoing questioning of the other person's motives and her own in the relationship they're already having. The needs for company & partnering are human nature, the choices we make to fulfill those needs are personal and give rise to more questioning.
This song is about a few different things but a couple of them appear to be the interdependent facts that people just generally need each other and having each other's company can be both comforting and arousing -- and then the matter of choosing who to be with, and then once two people have chosen each other, whether he/she is really the "right" person for me, and whether I'm the right person for him/her. The verse about "vulgar electricity" seems to be about all of this, including the ongoing questioning of the other person's motives and her own in the relationship they're already having. The needs for company & partnering are human nature, the choices we make to fulfill those needs are personal and give rise to more questioning.