This is an intriguing idea that I admit to swiping from Neil Gaiman's graphic novels of the Sandman.
Have you ever had a moment in which you suddenly realized that you could no longer remember what it felt like to be in love with someone whom you were once enamored? Or what it was like to have sex with a long-time lover? Or the face of someone you used to see every day? I've always felt that was a strange experience, to one moment just know that this is something you can no longer recall, when you always thought it was something you would never forget.
I think it would be an interesting exercise to try capturing all the details of one of those moments on paper. Anybody else game for this?