Black and White World Lyrics

Lyric discussion by popmattress 

Cover art for Black and White World lyrics by Elvis Costello

Same as below - Additionally, I think while he eventually realizes his idealization of the woman (real, past lover, imagined, photograph, etc.) is not reality, he just doesn't really care, he's willing to live with the fantasy obsession he's created - it works better for him, so he sticks with it.
Memories erase imperfections.

My Interpretation