Dave Grohl Speaks... 
"I consider myself a natural drummer rather than a natural guitar player, even though I started playing guitar first.  When I was 12 I had my little Silvertone guitar and I'd sit down with 'The Beatles Songbook' and try to figure out the songs, one by one.  It was a real challenge!  I started out writing songs for the same reason, just to challenge myself, to see if I could actually do it.  With Monkey Wrench I remember I had the main riff, but I didn't have the little jangly riff that goes over the top of it and I thought it needed something.  So I came up with the jangly riff and thought 'Oh my God this is never gonna fly!  Everyone's gonna hate it'.  But I was really excited the first time I heard it on the radio - it was in the middle of a load of mid-'90s grunge shit and I thought it was so killer."