As we realized in the last act and as I have noticed in the second act, Gallimard is blind to his relationship with Song. He both is blind to his actual feelings for him/her and physically is blind to her gender.  Looking through my itunes, I noticed the song “Blinding” by Florence and the Machine describes blindness as a “dream state” which I believe accurately depicts Guillmard’s feelings for song; because he is not honest with his own emotions he creates his own blindness.  In general though, I think the lyrics to “Blinding” by Florence and the machine have some parallels to M.Butterfly.