Lyric discussion by ryfall101 

Cover art for I'm on Fire lyrics by Bruce Springsteen

Wow! a lot of comments on this one!

I think it's about a teenage boy who wants a girl who is already commited to someone else. No pedophelia here. "Daddy" refers to that person she's involved with. The "6 inch valley" and "Sheets soakin' wet" represent the psychological torture he feels at times knowing he can't have her. Great song.