I think the song is about an idealist and the belief in the impermanence of love. That's why it sounds weird, because most people in love think it will last forever - but it changes and with that change comes complexity and the woman in the song doesn't seem to have the emotional capacity to deal with it so she moves on when things get heavy. She thinks she has love figured out hence the: "she don't WONDER anymore" line. Love to her is for the moment like a sunset, rainbow or flower.
I think the song is about an idealist and the belief in the impermanence of love. That's why it sounds weird, because most people in love think it will last forever - but it changes and with that change comes complexity and the woman in the song doesn't seem to have the emotional capacity to deal with it so she moves on when things get heavy. She thinks she has love figured out hence the: "she don't WONDER anymore" line. Love to her is for the moment like a sunset, rainbow or flower.