The only song I have in my head at the moment is
"The Power of Love - Celine Dion"and I guess I don't need to describe why I think it fits for Lois and Clark.
oh and of course the song
"Holding Out For A Hero - Bonnie Tyler" because it always reminds me of the Pilot where Clark tried to find a suit. Every time I hear this song I have to think of Superman
"No one will look into your eyes..."
Let me think about that maybe I'll find some other songs too...