I think I must have dentistry on the mind. I thought this song was talking about "Novacaine" for the longest time. Something like, "I want some Novacaine, I want some novacaine" during the chorus. I think it says something like, "You must not know about me," instead. At least it sounds like that through the dental school radio they have playing in the hallways and patient lobbies (I admit it doesn't sound so much like it on here.) I must have thought the "to the left to the left" 's were coming from my instructors.
I thought it had something to do with the numbing effects of love and breaking up. What a clever song! Haha.