Lyric discussion by farlen 

Cover art for Pull Out lyrics by Death from Above 1979

Maybe I'm on the wrong track here, but I think it's just a song about the "pull out" method of birth control. I mean, if you look at it that way, "Let your spirit free" could be a shakepearian reference: In Hamlet, someone says to somebody "I'll raise a spirit in her circle." Or something like that.