Lyric discussion by beastiality 

Cover art for Line of Best Fit lyrics by Death Cab for Cutie

its about being in a relationship & as it progresses, you realize you dont like the other person much & actually grow to dislike them but you stick with it cuz its easier to tough it out than to get the hell out. it seems to describe having sex without any feeling anymore, i.e.: "wind me up, im ready", "i remember being inside something more than you".