Another way I actually just kinda saw it as was that the singer is a more dangerous figure than it seems. Perhaps the singer is an abusive and violent (next song "Violence"?..) person in the relationship, yet there was some odd sort of excitement, or Electricity, in the relationship that made the girl stay. Fear of him made her unsure all the time, but she never fully understood, so she's stayed with him. Finally, this song tells her that she seriously must leave this seemingly good, yet horrible relationship before something really bad happens.... IE: Violence.
OR
Another way I actually just kinda saw it as was that the singer is a more dangerous figure than it seems. Perhaps the singer is an abusive and violent (next song "Violence"?..) person in the relationship, yet there was some odd sort of excitement, or Electricity, in the relationship that made the girl stay. Fear of him made her unsure all the time, but she never fully understood, so she's stayed with him. Finally, this song tells her that she seriously must leave this seemingly good, yet horrible relationship before something really bad happens.... IE: Violence.